{
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      "text": "Important"
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    "category": "csaf_security_advisory",
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    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
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    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Red Hat OpenShift Container Platform release 4.20.27 is now available with updates to packages and images that fix several bugs and add enhancements.\n\nThis release includes a security update for Red Hat OpenShift Container Platform 4.20.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Red Hat OpenShift Container Platform is Red Hat\u0027s cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments.\n\nThis advisory contains the container images for Red Hat OpenShift Container Platform 4.20.27. See the following advisory for the RPM packages for this release:\n\nhttps://access.redhat.com/errata/RHBA-2026:29798\n\nSpace precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html/release_notes/\n\nSecurity Fix(es):\n\n* samba: Remote Code Execution in SAMR (CVE-2026-4408)\n* kernel: net/sched: act_pedit: extend the writable skb range per key (CVE-2026-46331)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAll OpenShift Container Platform 4.20 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html-single/updating_clusters/index#updating-cluster-cli.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
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        "summary": "https://access.redhat.com/errata/RHSA-2026:29799",
        "url": "https://access.redhat.com/errata/RHSA-2026:29799"
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        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_29799.json"
      }
    ],
    "title": "Red Hat Security Advisory: OpenShift Container Platform 4.20.27 bug fix and security update",
    "tracking": {
      "current_release_date": "2026-07-09T23:00:50+00:00",
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          "number": "3",
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      "status": "final",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Ron Ben Yizhak"
          ],
          "organization": "SafeBreach"
        },
        {
          "names": [
            "John Walker"
          ],
          "organization": "ZeroPath"
        }
      ],
      "cve": "CVE-2026-4408",
      "cwe": {
        "id": "CWE-78",
        "name": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
      },
      "discovery_date": "2026-05-19T09:24:56.961000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2479762"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the \"check password script\" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the \"check password script\" is used with %u and the samba-dcerpcd service is started as a system service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "samba: Remote Code Execution in SAMR",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "An Important remote code execution flaw exists in Samba file servers and classic domain controllers when configured with a \u0027check password script\u0027 that uses the unescaped \u0027%u\u0027 substitution character. This vulnerability arises from a non-default configuration where the `samba-dcerpcd` service is started as a system service, allowing an attacker to execute arbitrary commands by injecting shell meta-characters into the username. Active Directory Domain Controllers are not affected.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202606241928-0",
          "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202606241928-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-4408"
        },
        {
          "category": "external",
          "summary": "RHBZ#2479762",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479762"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-4408",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-4408"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4408",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4408"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.samba.org/show_bug.cgi?id=16034",
          "url": "https://bugzilla.samba.org/show_bug.cgi?id=16034"
        }
      ],
      "release_date": "2026-05-26T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-30T13:47:42+00:00",
          "details": "For OpenShift Container Platform 4.20 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:05f959160351e81679dfab48bab274579fcc320244cabe974410718b132445b1\n\n      (For s390x architecture)\n      The image digest is sha256:a651f4e93c83ff94a33167482f36421355a25abd85e22081c086ed20897caa8a\n\n      (For ppc64le architecture)\n      The image digest is sha256:28e677d97a6a9219e8f661aaca70a0b0190972c0d1173ddabfad19fe80405ab2\n\n      (For aarch64 architecture)\n      The image digest is sha256:f82534b7dda297c688947f35be54c9abdb62fdac30a6688c9baab6c8eba7a449\n\nAll OpenShift Container Platform 4.20 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html-single/updating_clusters/index#updating-cluster-cli.",
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            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202606241928-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202606241928-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202606241928-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:29799"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
          "product_ids": [
            "9Base-RHOSE-4.20:rhcos-aarch64-4.20.9.6.202606241928-0",
            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202606241928-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202606241928-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202606241928-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.0,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
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            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202606241928-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202606241928-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202606241928-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "samba: Remote Code Execution in SAMR"
    },
    {
      "cve": "CVE-2026-46331",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-05-18T06:17:23.219000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2479492"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s traffic control packet editing (pedit) subsystem. In tcf_pedit_act(), the copy-on-write (COW) range for skb_ensure_writable() is computed once before iterating over edit keys, but the calculation does not account for runtime header offsets added by typed keys. This can leave part of the target write region without a proper copy-on-write, leading to an out-of-bounds write that corrupts page cache memory. A local attacker with the ability to configure traffic control rules could exploit this to escalate privileges or crash the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net/sched: act_pedit: extend the writable skb range per key",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat rates this flaw as Important severity.\n\nThis vulnerability is in the kernel\u0027s traffic control (tc) pedit action, which requires CAP_NET_ADMIN capability to configure. By default in Red Hat Enterprise Linux, this limits exploitation to the root user or processes explicitly granted network administration capabilities. However, in some circumstances unprivileged users may obtain CAP_NET_ADMIN within user namespaces. Successful exploitation could lead to arbitrary code execution in kernel context or a system crash.\n\nRed Hat Enterprise Linux 7 and earlier are not affected. Within OpenShift Container Platform, the vulnerable module is not loaded by default, reducing the severity to Low.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202606241928-0",
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-46331"
        },
        {
          "category": "external",
          "summary": "RHBZ#2479492",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479492"
        },
        {
          "category": "external",
          "summary": "RHSB-2026-008",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-008"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-46331",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-46331"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46331",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46331"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/netdev/20260516162825.1480113-1-rollkingzzc@gmail.com/",
          "url": "https://lore.kernel.org/netdev/20260516162825.1480113-1-rollkingzzc@gmail.com/"
        }
      ],
      "release_date": "2026-05-18T04:04:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-30T13:47:42+00:00",
          "details": "For OpenShift Container Platform 4.20 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:05f959160351e81679dfab48bab274579fcc320244cabe974410718b132445b1\n\n      (For s390x architecture)\n      The image digest is sha256:a651f4e93c83ff94a33167482f36421355a25abd85e22081c086ed20897caa8a\n\n      (For ppc64le architecture)\n      The image digest is sha256:28e677d97a6a9219e8f661aaca70a0b0190972c0d1173ddabfad19fe80405ab2\n\n      (For aarch64 architecture)\n      The image digest is sha256:f82534b7dda297c688947f35be54c9abdb62fdac30a6688c9baab6c8eba7a449\n\nAll OpenShift Container Platform 4.20 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
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            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202606241928-0"
          ],
          "restart_required": {
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          "url": "https://access.redhat.com/errata/RHSA-2026:29799"
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        "text": "Red Hat OpenShift Container Platform is Red Hat\u0027s cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments.\n\nThis advisory contains the container images for Red Hat OpenShift Container Platform 4.21.22. See the following advisory for the RPM packages for this release:\n\nhttps://access.redhat.com/errata/RHBA-2026:29832\n\nSpace precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html/release_notes/\n\nSecurity Fix(es):\n\n* samba: Remote Code Execution in SAMR (CVE-2026-4408)\n* kernel: net/sched: act_pedit: extend the writable skb range per key (CVE-2026-46331)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAll OpenShift Container Platform 4.21 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html-single/updating_clusters/index#updating-cluster-cli.",
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        {
          "names": [
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          ],
          "organization": "ZeroPath"
        }
      ],
      "cve": "CVE-2026-4408",
      "cwe": {
        "id": "CWE-78",
        "name": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
      },
      "discovery_date": "2026-05-19T09:24:56.961000+00:00",
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        {
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          "text": "2479762"
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      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the \"check password script\" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the \"check password script\" is used with %u and the samba-dcerpcd service is started as a system service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "samba: Remote Code Execution in SAMR",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "An Important remote code execution flaw exists in Samba file servers and classic domain controllers when configured with a \u0027check password script\u0027 that uses the unescaped \u0027%u\u0027 substitution character. This vulnerability arises from a non-default configuration where the `samba-dcerpcd` service is started as a system service, allowing an attacker to execute arbitrary commands by injecting shell meta-characters into the username. Active Directory Domain Controllers are not affected.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "9Base-RHOSE-4.21:rhcos-s390x-4.21.9.6.202606241859-0",
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        ]
      },
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-4408"
        },
        {
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          "summary": "RHBZ#2479762",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479762"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-4408",
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        },
        {
          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4408"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.samba.org/show_bug.cgi?id=16034",
          "url": "https://bugzilla.samba.org/show_bug.cgi?id=16034"
        }
      ],
      "release_date": "2026-05-26T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-30T11:07:32+00:00",
          "details": "For OpenShift Container Platform 4.21 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:52e54316796bcb6f31212edf0c0c4f89d0383232371d5d0a5cfed1513198b94b\n\n      (For s390x architecture)\n      The image digest is sha256:1ffc16865f1ee1ecc25fc02eb8c9e14d074ae8bf57928665afc7890b002a3e3b\n\n      (For ppc64le architecture)\n      The image digest is sha256:d95843b934c121e386ac5499b0f7289017bf9c3ad46ede745c23431ba4fe804f\n\n      (For aarch64 architecture)\n      The image digest is sha256:e06817050a33fd33ec58e7e2942921bd91ce3c736a12acefb74dac80503e680d\n\nAll OpenShift Container Platform 4.21 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.21/html-single/updating_clusters/index#updating-cluster-cli.",
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            "9Base-RHOSE-4.21:rhcos-s390x-4.21.9.6.202606241859-0",
            "9Base-RHOSE-4.21:rhcos-x86_64-4.21.9.6.202606241859-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:29833"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
          "product_ids": [
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        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.0,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
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            "9Base-RHOSE-4.21:rhcos-s390x-4.21.9.6.202606241859-0",
            "9Base-RHOSE-4.21:rhcos-x86_64-4.21.9.6.202606241859-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "samba: Remote Code Execution in SAMR"
    },
    {
      "cve": "CVE-2026-46331",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-05-18T06:17:23.219000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2479492"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s traffic control packet editing (pedit) subsystem. In tcf_pedit_act(), the copy-on-write (COW) range for skb_ensure_writable() is computed once before iterating over edit keys, but the calculation does not account for runtime header offsets added by typed keys. This can leave part of the target write region without a proper copy-on-write, leading to an out-of-bounds write that corrupts page cache memory. A local attacker with the ability to configure traffic control rules could exploit this to escalate privileges or crash the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net/sched: act_pedit: extend the writable skb range per key",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat rates this flaw as Important severity.\n\nThis vulnerability is in the kernel\u0027s traffic control (tc) pedit action, which requires CAP_NET_ADMIN capability to configure. By default in Red Hat Enterprise Linux, this limits exploitation to the root user or processes explicitly granted network administration capabilities. However, in some circumstances unprivileged users may obtain CAP_NET_ADMIN within user namespaces. Successful exploitation could lead to arbitrary code execution in kernel context or a system crash.\n\nRed Hat Enterprise Linux 7 and earlier are not affected. Within OpenShift Container Platform, the vulnerable module is not loaded by default, reducing the severity to Low.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "summary": "Canonical URL",
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          "summary": "RHBZ#2479492",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479492"
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          "summary": "RHSB-2026-008",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-008"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-46331",
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        },
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          "summary": "https://lore.kernel.org/netdev/20260516162825.1480113-1-rollkingzzc@gmail.com/",
          "url": "https://lore.kernel.org/netdev/20260516162825.1480113-1-rollkingzzc@gmail.com/"
        }
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        "text": "Red Hat OpenShift Container Platform release 4.18.46 is now available with updates to packages and images that fix several bugs and add enhancements.\n\nThis release includes a security update for Red Hat OpenShift Container Platform 4.18.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-05-18T06:17:23.219000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2479492"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s traffic control packet editing (pedit) subsystem. In tcf_pedit_act(), the copy-on-write (COW) range for skb_ensure_writable() is computed once before iterating over edit keys, but the calculation does not account for runtime header offsets added by typed keys. This can leave part of the target write region without a proper copy-on-write, leading to an out-of-bounds write that corrupts page cache memory. A local attacker with the ability to configure traffic control rules could exploit this to escalate privileges or crash the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net/sched: act_pedit: extend the writable skb range per key",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat rates this flaw as Important severity.\n\nThis vulnerability is in the kernel\u0027s traffic control (tc) pedit action, which requires CAP_NET_ADMIN capability to configure. By default in Red Hat Enterprise Linux, this limits exploitation to the root user or processes explicitly granted network administration capabilities. However, in some circumstances unprivileged users may obtain CAP_NET_ADMIN within user namespaces. Successful exploitation could lead to arbitrary code execution in kernel context or a system crash.\n\nRed Hat Enterprise Linux 7 and earlier are not affected. Within OpenShift Container Platform, the vulnerable module is not loaded by default, reducing the severity to Low.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "9Base-RHOSE-4.18:rhcos-ppc64le-418.94.202606221349-0",
          "9Base-RHOSE-4.18:rhcos-s390x-418.94.202606221349-0",
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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-46331"
        },
        {
          "category": "external",
          "summary": "RHBZ#2479492",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479492"
        },
        {
          "category": "external",
          "summary": "RHSB-2026-008",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-008"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-46331",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-46331"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46331",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46331"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/netdev/20260516162825.1480113-1-rollkingzzc@gmail.com/",
          "url": "https://lore.kernel.org/netdev/20260516162825.1480113-1-rollkingzzc@gmail.com/"
        }
      ],
      "release_date": "2026-05-18T04:04:00+00:00",
      "remediations": [
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          "date": "2026-07-01T11:46:17+00:00",
          "details": "For OpenShift Container Platform 4.18 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:fba0d35fceb1c0a4b96bb9933102694f176a7cf95e2af83f6d35401901fefe79\n\n      (For s390x architecture)\n      The image digest is sha256:8f82ee6801c6268da2806b53fcb6950bae43813ad24916f6d5a1980e000846b5\n\n      (For ppc64le architecture)\n      The image digest is sha256:a1631854bc2325dc9fabd8a33869db17cc876c6792de3877d8c1f5bcdb4e08d7\n\n      (For aarch64 architecture)\n      The image digest is sha256:2024f35fed0bb2d3ef7a01be8ab54c67afadb12de712fe1070023f9743e05001\n\nAll OpenShift Container Platform 4.18 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html-single/updating_clusters/index#updating-cluster-cli.",
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            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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          "details": "Low"
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      "title": "kernel: net/sched: act_pedit: extend the writable skb range per key"
    }
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}

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      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
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        "text": "Red Hat OpenShift Container Platform release 4.19.36 is now available with\nupdates to packages and images that fix several bugs and add enhancements.\n\n This release includes a security update for Red Hat OpenShift Container\nPlatform 4.19.\n\nRed Hat Product Security has rated this update as having a security impact\nof Important. A Common Vulnerability Scoring System (CVSS) base score,\nwhich gives a detailed severity rating, is available for each vulnerability\nfrom the CVE link(s) in the References section.",
        "title": "Topic"
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      {
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        "text": "Red Hat OpenShift Container Platform is Red Hat\u0027s cloud computing\nKubernetes application platform solution designed for on-premise or private\ncloud deployments.\n\nThis advisory contains the container images for Red Hat OpenShift Container\nPlatform 4.19.36. See the following advisory for the RPM packages for this\nrelease:\n\nhttps://access.redhat.com/errata/RHBA-2026:29862\n\nSpace precludes documenting all of the container images in this advisory.\nSee the following Release Notes documentation, which will be updated\nshortly for this release, for details about these changes:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/release_notes/\n\nSecurity Fix(es):\n\n* bind: BIND: Denial of Service via maliciously crafted DNSSEC-validated\nzone (CVE-2026-1519)\n* samba: Missing access check on reparse point operations (CVE-2026-1933)\n* samba: group policy certificate enrollment uses http:// without\nvalidation (CVE-2026-3012)\n* samba: Remote Code Execution in SAMR (CVE-2026-4408)\n* kernel: net/sched: act_pedit: extend the writable skb range per key\n(CVE-2026-46331)\n* samba: vfs_worm does not block directory modification (CVE-2026-2340)\n\nFor more details about the security issue(s), including the impact, a CVSS\nscore, acknowledgments, and other related information, refer to the CVE\npage(s) listed in the References section.\n\nAll OpenShift Container Platform 4.19 users are advised to upgrade to these\nupdated packages and images when they are available in the appropriate\nrelease channel. To check for available updates, use the OpenShift CLI (oc)\nor web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
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    "title": "Red Hat Security Advisory: OpenShift Container Platform 4.19.36 bug fix and security update",
    "tracking": {
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      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2026-03-25T14:01:56.586125+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2451305"
        }
      ],
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        {
          "category": "description",
          "text": "A flaw was found in BIND. A remote attacker could exploit this vulnerability by sending a maliciously crafted DNSSEC-validated zone to a BIND resolver. This could cause the resolver to consume excessive CPU resources, leading to a denial of service (DoS) for legitimate users.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "bind: BIND: Denial of Service via maliciously crafted DNSSEC-validated zone",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated as Important. A flaw in BIND allows a remote attacker to cause a Denial of Service by sending a maliciously crafted DNSSEC-validated zone to a BIND resolver. Red Hat systems running BIND configured for DNSSEC validation are affected. Authoritative-only BIND servers are generally not impacted unless configured to perform recursive queries.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
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          "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-1519"
        },
        {
          "category": "external",
          "summary": "RHBZ#2451305",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451305"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-1519",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-1519"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-1519",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1519"
        },
        {
          "category": "external",
          "summary": "https://downloads.isc.org/isc/bind9/9.18.47",
          "url": "https://downloads.isc.org/isc/bind9/9.18.47"
        },
        {
          "category": "external",
          "summary": "https://downloads.isc.org/isc/bind9/9.20.21",
          "url": "https://downloads.isc.org/isc/bind9/9.20.21"
        },
        {
          "category": "external",
          "summary": "https://downloads.isc.org/isc/bind9/9.21.20",
          "url": "https://downloads.isc.org/isc/bind9/9.21.20"
        },
        {
          "category": "external",
          "summary": "https://kb.isc.org/docs/cve-2026-1519",
          "url": "https://kb.isc.org/docs/cve-2026-1519"
        }
      ],
      "release_date": "2026-03-25T13:25:19.802000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-02T18:31:08+00:00",
          "details": "For OpenShift Container Platform 4.19 see the following documentation,\nwhich will be updated shortly for this release, for important instructions\non how to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata\nfor x86_64, s390x, ppc64le, and aarch64 architectures. The image digests\nmay be found at\nhttps://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:314fe5cf32cbc22f8e400b211d530beeb027ac3d3cd5479ef953b74cf0c4676b\n\n      (For s390x architecture)\n      The image digest is sha256:4c7df105e7806009d6860cef81b0b5be58dc023df684bc43a61ed7dba5921bb6\n\n      (For ppc64le architecture)\n      The image digest is sha256:7f60908cbff8428a398d684ce298461a7fb865fb70f4b4211bb5a8a365400c08\n\n      (For aarch64 architecture)\n      The image digest is sha256:c771b7b0a37477cb8e88cc7acae2f1651c2a5645b84e23e091bc02b0efcf1e97\n\nAll OpenShift Container Platform 4.19 users are advised to upgrade to these\nupdated packages and images when they are available in the appropriate\nrelease channel. To check for available updates, use the OpenShift CLI (oc)\nor web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
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            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:29863"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, disable DNSSEC validation on affected BIND resolvers. Alternatively, configure the BIND server as authoritative-only if recursive queries are not required. Disabling DNSSEC validation may reduce the security posture of the DNS resolver. A restart of the BIND service (`named`) is required for these changes to take effect and may temporarily interrupt DNS resolution.",
          "product_ids": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "bind: BIND: Denial of Service via maliciously crafted DNSSEC-validated zone"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Asim Viladi Oglu Manizada"
          ]
        }
      ],
      "cve": "CVE-2026-1933",
      "cwe": {
        "id": "CWE-284",
        "name": "Improper Access Control"
      },
      "discovery_date": "2026-03-13T08:29:39.852000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2447317"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Samba\u2019s handling of NTFS-style reparse points on shares configured with read only = yes. Due to missing SMB-layer access checks, authenticated users with underlying filesystem write permissions may create or delete reparse point metadata through SMB operations even on read-only exports. This could allow modification of SMB-visible file behavior, including converting files into symbolic links or other reparse point types.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "samba: Missing access check on reparse point operations",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated Important severity by Red Hat Product Security, because authenticated users with filesystem-level write permissions may bypass Samba\u2019s SMB-layer read-only protections for reparse point operations.\n\nThe flaw affects shares configured with \"read only = yes\", where Samba failed to properly enforce access checks when setting or deleting reparse point metadata. An attacker with existing write permissions on the underlying filesystem may manipulate SMB reparse point metadata to alter how files are presented to SMB clients, including converting files into symbolic links.\n\nThe vulnerability does not bypass underlying filesystem access controls or grant additional operating system privileges. However, successful exploitation may significantly disrupt file access for users of the affected share, including making large portions of a shared filesystem unavailable through widespread reparse point modification. Because the attack requires authenticated access and existing filesystem write permissions, Privileges Required are assessed as Low (PR:L).\n\n```\n\nThis vulnerability affects Samba versions beginning with the introduction of NTFS-style reparse point support in Samba 4.21.\n\n```",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-1933"
        },
        {
          "category": "external",
          "summary": "RHBZ#2447317",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2447317"
        },
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-1933",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-1933"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-1933",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1933"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.samba.org/show_bug.cgi?id=15992",
          "url": "https://bugzilla.samba.org/show_bug.cgi?id=15992"
        }
      ],
      "release_date": "2026-05-27T12:08:33.095000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-02T18:31:08+00:00",
          "details": "For OpenShift Container Platform 4.19 see the following documentation,\nwhich will be updated shortly for this release, for important instructions\non how to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata\nfor x86_64, s390x, ppc64le, and aarch64 architectures. The image digests\nmay be found at\nhttps://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:314fe5cf32cbc22f8e400b211d530beeb027ac3d3cd5479ef953b74cf0c4676b\n\n      (For s390x architecture)\n      The image digest is sha256:4c7df105e7806009d6860cef81b0b5be58dc023df684bc43a61ed7dba5921bb6\n\n      (For ppc64le architecture)\n      The image digest is sha256:7f60908cbff8428a398d684ce298461a7fb865fb70f4b4211bb5a8a365400c08\n\n      (For aarch64 architecture)\n      The image digest is sha256:c771b7b0a37477cb8e88cc7acae2f1651c2a5645b84e23e091bc02b0efcf1e97\n\nAll OpenShift Container Platform 4.19 users are advised to upgrade to these\nupdated packages and images when they are available in the appropriate\nrelease channel. To check for available updates, use the OpenShift CLI (oc)\nor web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:29863"
        },
        {
          "category": "workaround",
          "details": "Administrators can mitigate this issue by ensuring users who access a read only = yes Samba share do not have filesystem-level write permission to the exported files.\n\nA server administrator may also monitor and remove unintended \"user.SmbReparse\" xattr (extended attributes) and the associated FILE_ATTRIBUTE_REPARSE_POINT \"user.DosAttrib\" bit metadata if exploitation is suspected.",
          "product_ids": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "samba: Missing access check on reparse point operations"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Pavel Kohout"
          ],
          "organization": "Aisle Research"
        }
      ],
      "cve": "CVE-2026-2340",
      "cwe": {
        "id": "CWE-280",
        "name": "Improper Handling of Insufficient Permissions or Privileges"
      },
      "discovery_date": "2026-03-13T12:55:04.465000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2447318"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Samba\u2019s vfs_worm module. The module is intended to provide write-once, read-many (WORM) protections by preventing modification of files after a configurable grace period. Due to insufficient validation during rename operations, an authenticated user with write access to a share could overwrite a protected file by renaming a newly created file over the existing WORM-protected file.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "samba: vfs_worm does not block directory modification",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated Moderate severity because exploitation requires authenticated write access to a Samba share already configured to permit file creation and modification.\n\nThe flaw affects the vfs_worm module, which provides additional immutability protections for files after a configurable grace period. Due to improper handling of rename operations, a user with existing write permissions could overwrite files that should have become immutable under the WORM policy.\n\nThe vulnerability does not bypass underlying filesystem access controls or grant additional privileges beyond those already assigned to the authenticated user. However, because the primary purpose of the vfs_worm module is to protect file integrity, the ability to modify protected files results in a high integrity impact.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-2340"
        },
        {
          "category": "external",
          "summary": "RHBZ#2447318",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2447318"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-2340",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-2340"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-2340",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2340"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.samba.org/show_bug.cgi?id=15997",
          "url": "https://bugzilla.samba.org/show_bug.cgi?id=15997"
        }
      ],
      "release_date": "2026-05-27T10:35:47.805000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-02T18:31:08+00:00",
          "details": "For OpenShift Container Platform 4.19 see the following documentation,\nwhich will be updated shortly for this release, for important instructions\non how to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata\nfor x86_64, s390x, ppc64le, and aarch64 architectures. The image digests\nmay be found at\nhttps://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:314fe5cf32cbc22f8e400b211d530beeb027ac3d3cd5479ef953b74cf0c4676b\n\n      (For s390x architecture)\n      The image digest is sha256:4c7df105e7806009d6860cef81b0b5be58dc023df684bc43a61ed7dba5921bb6\n\n      (For ppc64le architecture)\n      The image digest is sha256:7f60908cbff8428a398d684ce298461a7fb865fb70f4b4211bb5a8a365400c08\n\n      (For aarch64 architecture)\n      The image digest is sha256:c771b7b0a37477cb8e88cc7acae2f1651c2a5645b84e23e091bc02b0efcf1e97\n\nAll OpenShift Container Platform 4.19 users are advised to upgrade to these\nupdated packages and images when they are available in the appropriate\nrelease channel. To check for available updates, use the OpenShift CLI (oc)\nor web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:29863"
        },
        {
          "category": "workaround",
          "details": "Administrators can mitigate this issue by:\n\nSetting read-only permissions on protected files at the underlying filesystem level will prevent modifications.\n\nConfiguring ```worm:grace_period = 0``` (zero or less) in smb.conf will eliminate the writable grace period (will eliminate the window in which the rename can happen), understanding that this may impact workflows requiring multi-step file creation.",
          "product_ids": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "samba: vfs_worm does not block directory modification"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Arad Inbar",
            "Nir Somech",
            "Ben Grinberg"
          ],
          "organization": "DREAM Security Research Team"
        },
        {
          "names": [
            "Michalis Vasileiadis"
          ]
        }
      ],
      "cve": "CVE-2026-3012",
      "cwe": {
        "id": "CWE-345",
        "name": "Insufficient Verification of Data Authenticity"
      },
      "discovery_date": "2026-03-13T12:55:02.623000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2447319"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Samba\u2019s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "samba: group policy certificate enrollment uses http:// without validation",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat Product Security has rated this vulnerability as Important severity. \n\nHowever, exploitation requires several specific non-default conditions to be met. The vulnerable code path is only reachable when Samba Group Policy processing is explicitly enabled using the ```apply group policies = yes``` configuration option and certificate auto-enrollment is configured through Group Policy.\n\nHence, although the vulnerable code is present, it is not exploitable in default RHEL configurations. \n\nIn addition, the attacker must have the ability to intercept or redirect adjacent-network HTTP traffic during certificate retrieval. Because exploitation depends on explicit administrative configuration changes and adjacent-network positioning, Red Hat assesses the attack complexity as High (AC:H).",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-3012"
        },
        {
          "category": "external",
          "summary": "RHBZ#2447319",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2447319"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-3012",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-3012"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-3012",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3012"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.samba.org/show_bug.cgi?id=16003",
          "url": "https://bugzilla.samba.org/show_bug.cgi?id=16003"
        }
      ],
      "release_date": "2026-05-27T09:17:49.862000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-02T18:31:08+00:00",
          "details": "For OpenShift Container Platform 4.19 see the following documentation,\nwhich will be updated shortly for this release, for important instructions\non how to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata\nfor x86_64, s390x, ppc64le, and aarch64 architectures. The image digests\nmay be found at\nhttps://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:314fe5cf32cbc22f8e400b211d530beeb027ac3d3cd5479ef953b74cf0c4676b\n\n      (For s390x architecture)\n      The image digest is sha256:4c7df105e7806009d6860cef81b0b5be58dc023df684bc43a61ed7dba5921bb6\n\n      (For ppc64le architecture)\n      The image digest is sha256:7f60908cbff8428a398d684ce298461a7fb865fb70f4b4211bb5a8a365400c08\n\n      (For aarch64 architecture)\n      The image digest is sha256:c771b7b0a37477cb8e88cc7acae2f1651c2a5645b84e23e091bc02b0efcf1e97\n\nAll OpenShift Container Platform 4.19 users are advised to upgrade to these\nupdated packages and images when they are available in the appropriate\nrelease channel. To check for available updates, use the OpenShift CLI (oc)\nor web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:29863"
        },
        {
          "category": "workaround",
          "details": "Systems are not affected unless Samba Group Policy processing and certificate auto-enrollment are explicitly enabled.\n\nAdministrators can reduce exposure by:\n\nAvoiding unnecessary use of certificate auto-enrollment.\nEnsuring your \"smb.conf\" does not contain a line like ```apply group policies = yes```. If , group policy is not be enabled, the vulnerable code will not run.\n\nIntercepting the HTTP request requires some control over the local network or other devices to intercept or redirect traffic. Some network administrators might assess this as a low risk on their\nnetworks.",
          "product_ids": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.0,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "samba: group policy certificate enrollment uses http:// without validation"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Ron Ben Yizhak"
          ],
          "organization": "SafeBreach"
        },
        {
          "names": [
            "John Walker"
          ],
          "organization": "ZeroPath"
        }
      ],
      "cve": "CVE-2026-4408",
      "cwe": {
        "id": "CWE-78",
        "name": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
      },
      "discovery_date": "2026-05-19T09:24:56.961000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2479762"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the \"check password script\" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the \"check password script\" is used with %u and the samba-dcerpcd service is started as a system service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "samba: Remote Code Execution in SAMR",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "An Important remote code execution flaw exists in Samba file servers and classic domain controllers when configured with a \u0027check password script\u0027 that uses the unescaped \u0027%u\u0027 substitution character. This vulnerability arises from a non-default configuration where the `samba-dcerpcd` service is started as a system service, allowing an attacker to execute arbitrary commands by injecting shell meta-characters into the username. Active Directory Domain Controllers are not affected.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
          "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202606241344-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-4408"
        },
        {
          "category": "external",
          "summary": "RHBZ#2479762",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479762"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-4408",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-4408"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-4408",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4408"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.samba.org/show_bug.cgi?id=16034",
          "url": "https://bugzilla.samba.org/show_bug.cgi?id=16034"
        }
      ],
      "release_date": "2026-05-26T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-02T18:31:08+00:00",
          "details": "For OpenShift Container Platform 4.19 see the following documentation,\nwhich will be updated shortly for this release, for important instructions\non how to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata\nfor x86_64, s390x, ppc64le, and aarch64 architectures. The image digests\nmay be found at\nhttps://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:314fe5cf32cbc22f8e400b211d530beeb027ac3d3cd5479ef953b74cf0c4676b\n\n      (For s390x architecture)\n      The image digest is sha256:4c7df105e7806009d6860cef81b0b5be58dc023df684bc43a61ed7dba5921bb6\n\n      (For ppc64le architecture)\n      The image digest is sha256:7f60908cbff8428a398d684ce298461a7fb865fb70f4b4211bb5a8a365400c08\n\n      (For aarch64 architecture)\n      The image digest is sha256:c771b7b0a37477cb8e88cc7acae2f1651c2a5645b84e23e091bc02b0efcf1e97\n\nAll OpenShift Container Platform 4.19 users are advised to upgrade to these\nupdated packages and images when they are available in the appropriate\nrelease channel. To check for available updates, use the OpenShift CLI (oc)\nor web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.",
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            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202606241344-0",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:29863"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
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        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.0,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
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            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
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        }
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        {
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      "title": "samba: Remote Code Execution in SAMR"
    },
    {
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      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-05-18T06:17:23.219000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2479492"
        }
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s traffic control packet editing (pedit) subsystem. In tcf_pedit_act(), the copy-on-write (COW) range for skb_ensure_writable() is computed once before iterating over edit keys, but the calculation does not account for runtime header offsets added by typed keys. This can leave part of the target write region without a proper copy-on-write, leading to an out-of-bounds write that corrupts page cache memory. A local attacker with the ability to configure traffic control rules could exploit this to escalate privileges or crash the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net/sched: act_pedit: extend the writable skb range per key",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat rates this flaw as Important severity.\n\nThis vulnerability is in the kernel\u0027s traffic control (tc) pedit action, which requires CAP_NET_ADMIN capability to configure. By default in Red Hat Enterprise Linux, this limits exploitation to the root user or processes explicitly granted network administration capabilities. However, in some circumstances unprivileged users may obtain CAP_NET_ADMIN within user namespaces. Successful exploitation could lead to arbitrary code execution in kernel context or a system crash.\n\nRed Hat Enterprise Linux 7 and earlier are not affected. Within OpenShift Container Platform, the vulnerable module is not loaded by default, reducing the severity to Low.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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        {
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          "summary": "RHBZ#2479492",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479492"
        },
        {
          "category": "external",
          "summary": "RHSB-2026-008",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-008"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-46331",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-46331"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46331",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46331"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/netdev/20260516162825.1480113-1-rollkingzzc@gmail.com/",
          "url": "https://lore.kernel.org/netdev/20260516162825.1480113-1-rollkingzzc@gmail.com/"
        }
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      "release_date": "2026-05-18T04:04:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-02T18:31:08+00:00",
          "details": "For OpenShift Container Platform 4.19 see the following documentation,\nwhich will be updated shortly for this release, for important instructions\non how to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata\nfor x86_64, s390x, ppc64le, and aarch64 architectures. The image digests\nmay be found at\nhttps://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:314fe5cf32cbc22f8e400b211d530beeb027ac3d3cd5479ef953b74cf0c4676b\n\n      (For s390x architecture)\n      The image digest is sha256:4c7df105e7806009d6860cef81b0b5be58dc023df684bc43a61ed7dba5921bb6\n\n      (For ppc64le architecture)\n      The image digest is sha256:7f60908cbff8428a398d684ce298461a7fb865fb70f4b4211bb5a8a365400c08\n\n      (For aarch64 architecture)\n      The image digest is sha256:c771b7b0a37477cb8e88cc7acae2f1651c2a5645b84e23e091bc02b0efcf1e97\n\nAll OpenShift Container Platform 4.19 users are advised to upgrade to these\nupdated packages and images when they are available in the appropriate\nrelease channel. To check for available updates, use the OpenShift CLI (oc)\nor web console. Instructions for upgrading a cluster are available at\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.19/html-single/updating_clusters/index#updating-cluster-cli.",
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          "url": "https://access.redhat.com/errata/RHSA-2026:29863"
        },
        {
          "category": "workaround",
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            "baseScore": 6.7,
            "baseSeverity": "MEDIUM",
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            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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            "version": "3.1"
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            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202606241344-0",
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "kernel: net/sched: act_pedit: extend the writable skb range per key"
    }
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        "text": "An update for multiple packages is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
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          "text": "A privilege escalation vulnerability was found in the Linux kernel\u0027s CIFS client implementation. This could allow a local attacker to impersonate other users, bypass authentication in SMB mount operations, and potentially gain unauthorized access to network file shares or escalate privileges.",
          "title": "Vulnerability description"
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          "text": "kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions",
          "title": "Vulnerability summary"
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          "text": "This issue is classified as Important severity primarily because a low-privileged local user can achieve full privilege escalation to root without any user interaction. The attack requires local access, which prevents remote exploitation and is the primary factor keeping the rating at Important rather than Critical.\n\nExploitation requires three components to be present on the system: the `cifs` kernel module (loaded or loadable), the `cifs-utils` package with its default `cifs.spnego` request-key rule, and the ability to create unprivileged user and mount namespaces. All three must be present for the attack chain to succeed. Environments that do not use SMB/CIFS file shares or Active Directory integration are unlikely to have `cifs-utils` installed, reducing their exposure.",
          "title": "Statement"
        },
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          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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        "id": "CWE-787",
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          "text": "2479492"
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          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s traffic control packet editing (pedit) subsystem. In tcf_pedit_act(), the copy-on-write (COW) range for skb_ensure_writable() is computed once before iterating over edit keys, but the calculation does not account for runtime header offsets added by typed keys. This can leave part of the target write region without a proper copy-on-write, leading to an out-of-bounds write that corrupts page cache memory. A local attacker with the ability to configure traffic control rules could exploit this to escalate privileges or crash the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net/sched: act_pedit: extend the writable skb range per key",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat rates this flaw as Important severity.\n\nThis vulnerability is in the kernel\u0027s traffic control (tc) pedit action, which requires CAP_NET_ADMIN capability to configure. By default in Red Hat Enterprise Linux, this limits exploitation to the root user or processes explicitly granted network administration capabilities. However, in some circumstances unprivileged users may obtain CAP_NET_ADMIN within user namespaces. Successful exploitation could lead to arbitrary code execution in kernel context or a system crash.\n\nRed Hat Enterprise Linux 7 and earlier are not affected. Within OpenShift Container Platform, the vulnerable module is not loaded by default, reducing the severity to Low.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-46331"
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          "category": "external",
          "summary": "RHBZ#2479492",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479492"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-46331",
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46331",
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          "summary": "https://lore.kernel.org/netdev/20260516162825.1480113-1-rollkingzzc@gmail.com/",
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      "title": "kernel: net/sched: act_pedit: extend the writable skb range per key"
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  "document": {
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      "text": "Important"
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    "category": "csaf_security_advisory",
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    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
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        "category": "summary",
        "text": "An update for multiple packages is now available for Red Hat Enterprise Linux 8.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
        "title": "Topic"
      },
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        "text": "This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel.  This patch module is targeted for kernel-4.18.0-553.53.1.el8_10.\n\nSecurity Fix(es):\n\n* kernel: net/sched: act_pedit: extend the writable skb range per key (CVE-2026-46331)\n\n* kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
        "title": "Details"
      },
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        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
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          "text": "kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions",
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          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "cve": "CVE-2026-46331",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
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          "text": "2479492"
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          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s traffic control packet editing (pedit) subsystem. In tcf_pedit_act(), the copy-on-write (COW) range for skb_ensure_writable() is computed once before iterating over edit keys, but the calculation does not account for runtime header offsets added by typed keys. This can leave part of the target write region without a proper copy-on-write, leading to an out-of-bounds write that corrupts page cache memory. A local attacker with the ability to configure traffic control rules could exploit this to escalate privileges or crash the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net/sched: act_pedit: extend the writable skb range per key",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat rates this flaw as Important severity.\n\nThis vulnerability is in the kernel\u0027s traffic control (tc) pedit action, which requires CAP_NET_ADMIN capability to configure. By default in Red Hat Enterprise Linux, this limits exploitation to the root user or processes explicitly granted network administration capabilities. However, in some circumstances unprivileged users may obtain CAP_NET_ADMIN within user namespaces. Successful exploitation could lead to arbitrary code execution in kernel context or a system crash.\n\nRed Hat Enterprise Linux 7 and earlier are not affected. Within OpenShift Container Platform, the vulnerable module is not loaded by default, reducing the severity to Low.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "category": "external",
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          "text": "A privilege escalation vulnerability was found in the Linux kernel\u0027s CIFS client implementation. This could allow a local attacker to impersonate other users, bypass authentication in SMB mount operations, and potentially gain unauthorized access to network file shares or escalate privileges.",
          "title": "Vulnerability description"
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          "text": "kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions",
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          "title": "Statement"
        },
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          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "url": "https://lore.kernel.org/linux-cve-announce/2026060140-CVE-2026-46243-3d1c@gregkh/"
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        "id": "CWE-787",
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          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s traffic control packet editing (pedit) subsystem. In tcf_pedit_act(), the copy-on-write (COW) range for skb_ensure_writable() is computed once before iterating over edit keys, but the calculation does not account for runtime header offsets added by typed keys. This can leave part of the target write region without a proper copy-on-write, leading to an out-of-bounds write that corrupts page cache memory. A local attacker with the ability to configure traffic control rules could exploit this to escalate privileges or crash the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net/sched: act_pedit: extend the writable skb range per key",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat rates this flaw as Important severity.\n\nThis vulnerability is in the kernel\u0027s traffic control (tc) pedit action, which requires CAP_NET_ADMIN capability to configure. By default in Red Hat Enterprise Linux, this limits exploitation to the root user or processes explicitly granted network administration capabilities. However, in some circumstances unprivileged users may obtain CAP_NET_ADMIN within user namespaces. Successful exploitation could lead to arbitrary code execution in kernel context or a system crash.\n\nRed Hat Enterprise Linux 7 and earlier are not affected. Within OpenShift Container Platform, the vulnerable module is not loaded by default, reducing the severity to Low.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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        "name": "Expired Pointer Dereference"
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          "category": "description",
          "text": "A privilege escalation vulnerability was found in the Linux kernel\u0027s CIFS client implementation. This could allow a local attacker to impersonate other users, bypass authentication in SMB mount operations, and potentially gain unauthorized access to network file shares or escalate privileges.",
          "title": "Vulnerability description"
        },
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          "category": "summary",
          "text": "kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions",
          "title": "Vulnerability summary"
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          "category": "other",
          "text": "This issue is classified as Important severity primarily because a low-privileged local user can achieve full privilege escalation to root without any user interaction. The attack requires local access, which prevents remote exploitation and is the primary factor keeping the rating at Important rather than Critical.\n\nExploitation requires three components to be present on the system: the `cifs` kernel module (loaded or loadable), the `cifs-utils` package with its default `cifs.spnego` request-key rule, and the ability to create unprivileged user and mount namespaces. All three must be present for the attack chain to succeed. Environments that do not use SMB/CIFS file shares or Active Directory integration are unlikely to have `cifs-utils` installed, reducing their exposure.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46243"
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          "category": "external",
          "summary": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3da1fdf4efbc490041eb4f836bf596201203f8f2",
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    {
      "cve": "CVE-2026-46331",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
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      "discovery_date": "2026-05-18T06:17:23.219000+00:00",
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          "text": "2479492"
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          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s traffic control packet editing (pedit) subsystem. In tcf_pedit_act(), the copy-on-write (COW) range for skb_ensure_writable() is computed once before iterating over edit keys, but the calculation does not account for runtime header offsets added by typed keys. This can leave part of the target write region without a proper copy-on-write, leading to an out-of-bounds write that corrupts page cache memory. A local attacker with the ability to configure traffic control rules could exploit this to escalate privileges or crash the system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net/sched: act_pedit: extend the writable skb range per key",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat rates this flaw as Important severity.\n\nThis vulnerability is in the kernel\u0027s traffic control (tc) pedit action, which requires CAP_NET_ADMIN capability to configure. By default in Red Hat Enterprise Linux, this limits exploitation to the root user or processes explicitly granted network administration capabilities. However, in some circumstances unprivileged users may obtain CAP_NET_ADMIN within user namespaces. Successful exploitation could lead to arbitrary code execution in kernel context or a system crash.\n\nRed Hat Enterprise Linux 7 and earlier are not affected. Within OpenShift Container Platform, the vulnerable module is not loaded by default, reducing the severity to Low.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: net/sched: act_pedit: extend the writable skb range per key"
    }
  ]
}