Vulnerability-Lookup

RHSA-2026:0420

Vulnerability from csaf_redhat - Published: 2026-01-14 13:25 - Updated: 2026-01-15 10:02

Summary

Red Hat Security Advisory: OpenShift Container Platform 4.20.10 bug fix and security update

Notes

Topic

Red Hat OpenShift Container Platform release 4.20.10 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.20. Red 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.

Details

Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.20.10. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/157897 Space 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: https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html/release_notes/ Security Fix(es): * bind: Resource exhaustion via malformed DNSKEY handling (CVE-2025-8677) * bind: Cache poisoning attacks with unsolicited RRs (CVE-2025-40778) * bind: Cache poisoning due to weak PRNG (CVE-2025-40780) * expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing (CVE-2025-59375) * openssl: Out-of-bounds read & write in RFC 3211 KEK Unwrap (CVE-2025-9230) For 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. All 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.

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.

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        "name": "Uncontrolled Resource Consumption"
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      "discovery_date": "2025-10-22T00:00:00+00:00",
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          "category": "description",
          "text": "A vulnerability was found in BIND 9 resolvers, where processing malformed DNSKEY records from a specially crafted zone can lead to resource exhaustion, primarily causing excessive CPU utilization. This issue enables a remote, unauthenticated attacker to degrade resolver performance and potentially cause a denial of service (DoS) for legitimate DNS clients.",
          "title": "Vulnerability description"
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        {
          "category": "summary",
          "text": "bind: Resource exhaustion via malformed DNSKEY handling",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is considered Important because it allows a remote, unauthenticated attacker to cause significant CPU exhaustion on vulnerable BIND resolvers by serving zones containing malformed DNSKEY records. The flaw triggers excessive computational effort during DNSKEY validation, leading to degraded performance and potential denial of service for legitimate clients. However, the issue affects availability only\u2014it does not enable code execution, data exposure, or privilege escalation\u2014so it is not classified as critical. Furthermore, authoritative servers are not impacted, limiting the scope of exposure to recursive resolvers. While the attack is easy to launch and can disrupt DNS operations, its effect ceases once the malicious traffic stops, making prompt patching and recursive access control effective mitigations.",
          "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-2025-8677"
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          "summary": "RHBZ#2405830",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2405830"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-8677",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-8677"
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        }
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      "release_date": "2025-10-22T00:00:00+00:00",
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          "category": "vendor_fix",
          "date": "2026-01-14T13:25:27+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 sha256:2d228e6d0b5a5ef2d7eb40bc171ad44f06b990d7adb678914e5d9d047e72568d\n\n      (For s390x architecture)\n      The image digest is sha256:af6307b4034d762e4b50edfcbeff0bdd58d4530cecb960ad777fe977c5775d11\n\n      (For ppc64le architecture)\n      The image digest is sha256:7ce9923ffac52e14a5674744810689466a49479ace1525d96e1c81c6f4928eaf\n\n      (For aarch64 architecture)\n      The image digest is sha256:a1b224a91987e73d8e27b920b118fa13897c45d832fbdf38ec72d50d0e6cb8dc\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\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html-single/updating_clusters/index#updating-cluster-cli.",
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        {
          "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.\n\nTo reduce risk, restrict recursive queries to trusted or internal networks only, and apply rate limiting or firewall rules to prevent excessive or repetitive requests. Enabling DNSSEC validation helps reject forged records, while isolating recursive resolvers from authoritative servers limits the impact of potential cache poisoning. Active monitoring of CPU usage, query volume, and cache anomalies can provide early warning of abuse or attacks.",
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      "scores": [
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            "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"
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            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "bind: Resource exhaustion via malformed DNSKEY handling"
    },
    {
      "cve": "CVE-2025-9230",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2025-09-17T12:15:34.387000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2396054"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Issue summary: An application trying to decrypt CMS messages encrypted using\npassword based encryption can trigger an out-of-bounds read and write.\n\nImpact summary: This out-of-bounds read may trigger a crash which leads to\nDenial of Service for an application. The out-of-bounds write can cause\na memory corruption which can have various consequences including\na Denial of Service or Execution of attacker-supplied code.\n\nAlthough the consequences of a successful exploit of this vulnerability\ncould be severe, the probability that the attacker would be able to\nperform it is low. Besides, password based (PWRI) encryption support in CMS\nmessages is very rarely used. For that reason the issue was assessed as\nModerate severity according to our Security Policy.\n\nThe FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this\nissue, as the CMS implementation is outside the OpenSSL FIPS module\nboundary.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "openssl: Out-of-bounds read \u0026 write in RFC 3211 KEK Unwrap",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "The vulnerability was rated as Moderate because, while the potential impact includes an application level denial of service and possible arbitrary code execution, successful exploitation is considered unlikely due to the high attack complexity and the fact that password-based CMS encryption (PWRI) is rarely used in real-world deployments.\n\nWithin regulated environments, a combination of the following controls acts as a significant barrier to successful exploitation of a CWE-787: Out-of-bounds Write or a CWE-125: Out-of-bounds Read vulnerability, and therefore downgrades the severity of this particular CVE from Moderate to Low.\n\nThe platform enforces hardening guidelines and baseline configurations to ensure secure system and software settings, while least functionality reduces the attack surface by disabling unnecessary services and ports. Rigorous development practices, including static analysis, input validation, and error handling, detect and mitigate memory vulnerabilities before deployment. Process isolation and memory protection mechanisms such as Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) preserve memory integrity by confining faults to individual workloads and preventing unauthorized access. Malicious code protections and continuous system monitoring detect anomalous memory activity and exploitation attempts, reducing the likelihood and impact of out-of-bounds read and write vulnerabilities.",
          "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",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-9230",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-9230"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-9230",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-9230"
        }
      ],
      "release_date": "2025-09-30T23:59:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-01-14T13:25:27+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 sha256:2d228e6d0b5a5ef2d7eb40bc171ad44f06b990d7adb678914e5d9d047e72568d\n\n      (For s390x architecture)\n      The image digest is sha256:af6307b4034d762e4b50edfcbeff0bdd58d4530cecb960ad777fe977c5775d11\n\n      (For ppc64le architecture)\n      The image digest is sha256:7ce9923ffac52e14a5674744810689466a49479ace1525d96e1c81c6f4928eaf\n\n      (For aarch64 architecture)\n      The image digest is sha256:a1b224a91987e73d8e27b920b118fa13897c45d832fbdf38ec72d50d0e6cb8dc\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\nhttps://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-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:0420"
        },
        {
          "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-aarch64-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.6,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.20:rhcos-aarch64-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "openssl: Out-of-bounds read \u0026 write in RFC 3211 KEK Unwrap"
    },
    {
      "cve": "CVE-2025-40778",
      "cwe": {
        "id": "CWE-347",
        "name": "Improper Verification of Cryptographic Signature"
      },
      "discovery_date": "2025-10-22T15:07:23.729000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2405827"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability exists in BIND\u2019s DNS resolver logic that makes it overly permissive when accepting resource records (RRs) in responses. Under certain conditions, this flaw allows attackers to inject unsolicited or forged DNS records into the cache. This can be exploited to poison the resolver cache, redirecting clients to malicious domains or unauthorized servers.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "bind: Cache poisoning attacks with unsolicited RRs",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "It is classified as Important rather than Critical because its impact is limited to cache poisoning within recursive resolvers and does not allow direct code execution, privilege escalation, or service disruption. The vulnerability affects the accuracy of DNS responses, but not the availability or confidentiality of systems. Additionally, DNSSEC-enabled deployments and restricted recursive access can significantly mitigate exploitation risks. Therefore, while the flaw can misdirect network traffic and compromise trust in name resolution, it does not directly compromise the underlying server or client systems, justifying an Important \u2014 but not Critical \u2014 severity rating.\n\nTechnical Analysis:\nThe issue arises because BIND fails to strictly validate unsolicited resource records accompanying legitimate DNS responses. This gap allows forged recursive resolvers to be cached as valid entries. Since the attack is remote, requires no authentication, and exploits a low-complexity vector, it is highly impactful in recursive resolver environments\u2014especially those exposed to untrusted clients or open resolvers.",
          "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-4.20:rhcos-aarch64-4.20.9.6.202601052146-0",
          "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
          "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
          "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-40778"
        },
        {
          "category": "external",
          "summary": "RHBZ#2405827",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2405827"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-40778",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-40778"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-40778",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40778"
        }
      ],
      "release_date": "2025-10-22T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-01-14T13:25:27+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 sha256:2d228e6d0b5a5ef2d7eb40bc171ad44f06b990d7adb678914e5d9d047e72568d\n\n      (For s390x architecture)\n      The image digest is sha256:af6307b4034d762e4b50edfcbeff0bdd58d4530cecb960ad777fe977c5775d11\n\n      (For ppc64le architecture)\n      The image digest is sha256:7ce9923ffac52e14a5674744810689466a49479ace1525d96e1c81c6f4928eaf\n\n      (For aarch64 architecture)\n      The image digest is sha256:a1b224a91987e73d8e27b920b118fa13897c45d832fbdf38ec72d50d0e6cb8dc\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\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.20:rhcos-aarch64-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:0420"
        },
        {
          "category": "workaround",
          "details": "While it is not possible to eliminate risk from this vulnerability, there are several options for reducing the risk. These include restricting recursive queries to trusted or internal networks only, and apply rate limiting or firewall rules to prevent excessive or repetitive requests. Enabling DNSSEC validation helps reject forged records, while isolating recursive resolvers from authoritative servers limits the impact of potential cache poisoning. Active monitoring of CPU usage, query volume, and cache anomalies can provide early warning of abuse or attacks.",
          "product_ids": [
            "9Base-RHOSE-4.20:rhcos-aarch64-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.20:rhcos-aarch64-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "bind: Cache poisoning attacks with unsolicited RRs"
    },
    {
      "cve": "CVE-2025-40780",
      "cwe": {
        "id": "CWE-338",
        "name": "Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)"
      },
      "discovery_date": "2025-10-22T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2405829"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability was found in BIND resolvers caused by a weakness in the Pseudo Random Number Generator (PRNG). This weakness allows an attacker to potentially predict the source port and query ID used by BIND, enabling cache poisoning attacks. If successful, the attacker can inject malicious DNS responses into the resolver\u2019s cache, causing clients to receive spoofed DNS data. Authoritative servers are generally unaffected, but recursive resolvers are exposed to this risk. Exploitation is remote and does not require user interaction.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "bind: Cache poisoning due to weak PRNG",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability in BIND 9 resolvers caused by a weakness in the Pseudo Random Number Generator (PRNG) used to select the UDP source port and DNS query (transaction) ID. Exploitation requires an attacker to correctly predict both values and race the legitimate authoritative response with a spoofed packet to perform cache poisoning. While the PRNG weakness reduces entropy and makes prediction feasible under certain conditions, this still requires precise timing, on-path or spoofing capabilities, and targeting of recursive resolvers.\n\nThe impact is limited to resolver cache integrity; it does not allow remote code execution, privilege escalation, or direct compromise of the BIND server itself. Authoritative servers are not affected. Additionally, operational mitigations such as DNSSEC validation, access control restricting recursion, and network-level packet filtering reduce real-world exploitability. No active exploits have been observed in the wild.\n\nBecause exploitation is non-trivial, requires network-level spoofing and precise timing, and only affects cache integrity without server compromise, the vulnerability is considered Important rather than Critical.",
          "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-4.20:rhcos-aarch64-4.20.9.6.202601052146-0",
          "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
          "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
          "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-40780"
        },
        {
          "category": "external",
          "summary": "RHBZ#2405829",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2405829"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-40780",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-40780"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-40780",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40780"
        }
      ],
      "release_date": "2025-10-22T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-01-14T13:25:27+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 sha256:2d228e6d0b5a5ef2d7eb40bc171ad44f06b990d7adb678914e5d9d047e72568d\n\n      (For s390x architecture)\n      The image digest is sha256:af6307b4034d762e4b50edfcbeff0bdd58d4530cecb960ad777fe977c5775d11\n\n      (For ppc64le architecture)\n      The image digest is sha256:7ce9923ffac52e14a5674744810689466a49479ace1525d96e1c81c6f4928eaf\n\n      (For aarch64 architecture)\n      The image digest is sha256:a1b224a91987e73d8e27b920b118fa13897c45d832fbdf38ec72d50d0e6cb8dc\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\nhttps://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-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:0420"
        },
        {
          "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.\n\nTo reduce risk, restrict recursive queries to trusted or internal networks only, and apply rate limiting or firewall rules to prevent excessive or repetitive requests. Enabling DNSSEC validation helps reject forged records, while isolating recursive resolvers from authoritative servers limits the impact of potential cache poisoning. Active monitoring of CPU usage, query volume, and cache anomalies can provide early warning of abuse or attacks.",
          "product_ids": [
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            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          },
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            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "bind: Cache poisoning due to weak PRNG"
    },
    {
      "cve": "CVE-2025-59375",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2025-09-15T03:00:59.775098+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2395108"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A memory amplification vulnerability in libexpat allows attackers to trigger excessive dynamic memory allocations by submitting specially crafted XML input. A small input (~250 KiB) can cause the parser to allocate hundreds of megabytes, leading to denial-of-service (DoS) through memory exhaustion.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue is Important rather than Critical because, while it allows for significant resource exhaustion leading to denial-of-service (DoS), it does not enable arbitrary code execution, data leakage, or privilege escalation. The vulnerability stems from an uncontrolled memory amplification behavior in libexpat\u2019s parser, where a relatively small XML payload can cause disproportionately large heap allocations. However, the flaw is limited in scope to service disruption and requires the attacker to submit a crafted XML document\u2014something that can be mitigated with proper input validation and memory usage limits. Therefore, while the exploitability is high, the impact is confined to availability, not confidentiality or integrity, making it a high-severity but not critical flaw.\n\nIn Firefox and Thunderbird, where libexpat is a transitive userspace dependency, exploitation usually just crashes the application (app-level DoS), so it is classify as Moderate instead of Important.",
          "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-4.20:rhcos-aarch64-4.20.9.6.202601052146-0",
          "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
          "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
          "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-59375"
        },
        {
          "category": "external",
          "summary": "RHBZ#2395108",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395108"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-59375",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-59375"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-59375",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-59375"
        },
        {
          "category": "external",
          "summary": "https://github.com/libexpat/libexpat/blob/676a4c531ec768732fac215da9730b5f50fbd2bf/expat/Changes#L45-L74",
          "url": "https://github.com/libexpat/libexpat/blob/676a4c531ec768732fac215da9730b5f50fbd2bf/expat/Changes#L45-L74"
        },
        {
          "category": "external",
          "summary": "https://github.com/libexpat/libexpat/issues/1018",
          "url": "https://github.com/libexpat/libexpat/issues/1018"
        },
        {
          "category": "external",
          "summary": "https://github.com/libexpat/libexpat/pull/1034",
          "url": "https://github.com/libexpat/libexpat/pull/1034"
        },
        {
          "category": "external",
          "summary": "https://issues.oss-fuzz.com/issues/439133977",
          "url": "https://issues.oss-fuzz.com/issues/439133977"
        }
      ],
      "release_date": "2025-09-15T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-01-14T13:25:27+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 sha256:2d228e6d0b5a5ef2d7eb40bc171ad44f06b990d7adb678914e5d9d047e72568d\n\n      (For s390x architecture)\n      The image digest is sha256:af6307b4034d762e4b50edfcbeff0bdd58d4530cecb960ad777fe977c5775d11\n\n      (For ppc64le architecture)\n      The image digest is sha256:7ce9923ffac52e14a5674744810689466a49479ace1525d96e1c81c6f4928eaf\n\n      (For aarch64 architecture)\n      The image digest is sha256:a1b224a91987e73d8e27b920b118fa13897c45d832fbdf38ec72d50d0e6cb8dc\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\nhttps://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-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:0420"
        },
        {
          "category": "workaround",
          "details": "To mitigate the issue, limit XML input size and complexity before parsing, and avoid accepting compressed or deeply nested XML. Use OS-level resource controls (like ulimit or setrlimit()) to cap memory usage, or run the parser in a sandboxed or isolated process with strict memory and CPU limits. This helps prevent denial-of-service by containing excessive resource consumption.",
          "product_ids": [
            "9Base-RHOSE-4.20:rhcos-aarch64-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "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:L",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.20:rhcos-aarch64-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202601052146-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202601052146-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "expat: libexpat in Expat allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing"
    }
  ]
}

CVE-2025-8677 (GCVE-0-2025-8677)

Vulnerability from cvelistv5 – Published: 2025-10-22 15:43 – Updated: 2025-11-04 21:15

Title

Resource exhaustion via malformed DNSKEY handling

Summary

Querying for records within a specially crafted zone containing certain malformed DNSKEY records can lead to CPU exhaustion. This issue affects BIND 9 versions 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-405 - Asymmetric Resource Consumption (Amplification)

Assigner

isc

References

URL

Tags

https://kb.isc.org/docs/cve-2025-8677

vendor-advisory

Impacted products

	Vendor	Product	Version
	ISC	BIND 9	Affected: 9.18.0 , ≤ 9.18.39 (custom) Affected: 9.20.0 , ≤ 9.20.13 (custom) Affected: 9.21.0 , ≤ 9.21.12 (custom) Affected: 9.18.11-S1 , ≤ 9.18.39-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.13-S1 (custom)

Credits

ISC would like to thank Zuyao Xu and Xiang Li from the All-in-One Security and Privacy Laboratory at Nankai University for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

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CVE-2025-40780 (GCVE-0-2025-40780)

Vulnerability from cvelistv5 – Published: 2025-10-22 15:48 – Updated: 2025-11-04 21:10

Title

Cache poisoning due to weak PRNG

Summary

In specific circumstances, due to a weakness in the Pseudo Random Number Generator (PRNG) that is used, it is possible for an attacker to predict the source port and query ID that BIND will use. This issue affects BIND 9 versions 9.16.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.16.8-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.

Severity ?

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

CWE

CWE-341 - Predictable from Observable State

Assigner

isc

References

URL

Tags

https://kb.isc.org/docs/cve-2025-40780

vendor-advisory

Impacted products

	Vendor	Product	Version
	ISC	BIND 9	Affected: 9.16.0 , ≤ 9.16.50 (custom) Affected: 9.18.0 , ≤ 9.18.39 (custom) Affected: 9.20.0 , ≤ 9.20.13 (custom) Affected: 9.21.0 , ≤ 9.21.12 (custom) Affected: 9.16.8-S1 , ≤ 9.16.50-S1 (custom) Affected: 9.18.11-S1 , ≤ 9.18.39-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.13-S1 (custom)

Credits

ISC would like to thank Prof. Amit Klein and Omer Ben Simhon from Hebrew University of Jerusalem for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

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CVE-2025-9230 (GCVE-0-2025-9230)

Vulnerability from cvelistv5 – Published: 2025-09-30 13:17 – Updated: 2025-11-04 21:15

Title

Out-of-bounds read & write in RFC 3211 KEK Unwrap

Summary

Issue summary: An application trying to decrypt CMS messages encrypted using password based encryption can trigger an out-of-bounds read and write. Impact summary: This out-of-bounds read may trigger a crash which leads to Denial of Service for an application. The out-of-bounds write can cause a memory corruption which can have various consequences including a Denial of Service or Execution of attacker-supplied code. Although the consequences of a successful exploit of this vulnerability could be severe, the probability that the attacker would be able to perform it is low. Besides, password based (PWRI) encryption support in CMS messages is very rarely used. For that reason the issue was assessed as Moderate severity according to our Security Policy. The FIPS modules in 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected by this issue, as the CMS implementation is outside the OpenSSL FIPS module boundary.

Severity ?

No CVSS data available.

CWE

CWE-125 - Out-of-bounds Read
CWE-787 - Out-of-bounds Write

Assigner

openssl

References

URL

Tags

	https://openssl-library.org/news/secadv/20250930.txt	vendor-advisory
	https://github.com/openssl/openssl/commit/bae259a…	patch
	https://github.com/openssl/openssl/commit/9e91358…	patch
	https://github.com/openssl/openssl/commit/5965ea5…	patch
	https://github.com/openssl/openssl/commit/b5282d6…	patch
	https://github.com/openssl/openssl/commit/a79c4ce…	patch
	https://github.openssl.org/openssl/extended-relea…	patch
	https://github.openssl.org/openssl/extended-relea…	patch

Impacted products

	Vendor	Product	Version
	OpenSSL	OpenSSL	Affected: 3.5.0 , < 3.5.4 (semver) Affected: 3.4.0 , < 3.4.3 (semver) Affected: 3.3.0 , < 3.3.5 (semver) Affected: 3.2.0 , < 3.2.6 (semver) Affected: 3.0.0 , < 3.0.18 (semver) Affected: 1.1.1 , < 1.1.1zd (custom) Affected: 1.0.2 , < 1.0.2zm (custom)

Credits

Stanislav Fort (Aisle Research) Stanislav Fort (Aisle Research) Viktor Dukhovni

Show details on NVD website

JSON

To clipboard

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CVE-2025-59375 (GCVE-0-2025-59375)

Vulnerability from cvelistv5 – Published: 2025-09-15 00:00 – Updated: 2025-11-04 21:13

Summary

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:H/RL:T/RC:C

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

mitre

References

URL

Tags

	https://github.com/libexpat/libexpat/issues/1018
	https://github.com/libexpat/libexpat/pull/1034
	https://github.com/libexpat/libexpat/blob/676a4c5…
	https://issues.oss-fuzz.com/issues/439133977
	https://github.com/libexpat/libexpat/blob/R_2_7_2…

Impacted products

	Vendor	Product	Version
	libexpat project	libexpat	Affected: 0 , < 2.7.2 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2025-40778 (GCVE-0-2025-40778)

Vulnerability from cvelistv5 – Published: 2025-10-22 15:47 – Updated: 2025-11-07 04:56

Title

Cache poisoning attacks with unsolicited RRs

Summary

Under certain circumstances, BIND is too lenient when accepting records from answers, allowing an attacker to inject forged data into the cache. This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.

Severity ?

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

CWE

CWE-349 - Acceptance of Extraneous Untrusted Data With Trusted Data

Assigner

isc

References

URL

Tags

https://kb.isc.org/docs/cve-2025-40778

vendor-advisory

Impacted products

	Vendor	Product	Version
	ISC	BIND 9	Affected: 9.11.0 , ≤ 9.16.50 (custom) Affected: 9.18.0 , ≤ 9.18.39 (custom) Affected: 9.20.0 , ≤ 9.20.13 (custom) Affected: 9.21.0 , ≤ 9.21.12 (custom) Affected: 9.11.3-S1 , ≤ 9.16.50-S1 (custom) Affected: 9.18.11-S1 , ≤ 9.18.39-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.13-S1 (custom)

Credits

ISC would like to thank Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan from Tsinghua University for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

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Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2026:0420

CVE-2025-8677 (GCVE-0-2025-8677)

CVE-2025-40780 (GCVE-0-2025-40780)

CVE-2025-9230 (GCVE-0-2025-9230)

CVE-2025-59375 (GCVE-0-2025-59375)

CVE-2025-40778 (GCVE-0-2025-40778)

Tags

Sightings

Nomenclature