RHSA-2026:5127

Vulnerability from csaf_redhat - Published: 2026-03-25 04:59 - Updated: 2026-04-01 13:33
Summary
Red Hat Security Advisory: OpenShift Container Platform 4.18.36 bug fix and security update
Severity
Moderate
Notes
Topic: Red Hat OpenShift Container Platform release 4.18.36 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 4.18. Red Hat Product Security has rated this update as having a security impact of Moderate. 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 4.18.36. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:5126 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/4.18/html/release_notes/ Security Fix(es): * nfs-utils: rpc.mountd in the nfs-utils privilege escalation (CVE-2025-12801) * grub2: Missing unregister call for gettext command may lead to use-after-free (CVE-2025-61662) 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 4.18 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 https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html-single/updating_clusters/index#updating-cluster-cli.
Terms of Use: 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.
CVE-2025-12801

A vulnerability was recently discovered in the rpc.mountd daemon in the nfs-utils package for Linux, that allows a NFSv3 client to escalate the privileges assigned to it in the /etc/exports file at mount time. In particular, it allows the client to access any subdirectory or subtree of an exported directory, regardless of the set file permissions, and regardless of any 'root_squash' or 'all_squash' attributes that would normally be expected to apply to that client.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE-279 - Incorrect Execution-Assigned Permissions
Vendor Fix 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 update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/release_notes/ You 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. The sha values for the release are as follows: (For x86_64 architecture) The image digest is sha256:7486ca2ec3bce0ee41dd2c03d75e120b6f660929ea50240463937ae1c4b118f7 (For s390x architecture) The image digest is sha256:907e10c7c312b21ba21efa0bf9610da3d69a97173eefba4510699a86c27b4b1d (For ppc64le architecture) The image digest is sha256:d08e99e6ab216fda7fc09188df598ebedb315b49680d6490e9df0b42ab4d5e0a (For aarch64 architecture) The image digest is sha256:9e1da5b54dab49265e57f7e95a7c912f2ad0d32dc6b013def90cb045fd1510b3 All 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 https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html-single/updating_clusters/index#updating-cluster-cli. https://access.redhat.com/errata/RHSA-2026:5127
Workaround 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.
CVE-2025-61662

A Use-After-Free vulnerability has been discovered in GRUB's gettext module. This flaw stems from a programming error where the gettext command remains registered in memory after its module is unloaded. An attacker can exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.

7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Fix 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 update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/release_notes/ You 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. The sha values for the release are as follows: (For x86_64 architecture) The image digest is sha256:7486ca2ec3bce0ee41dd2c03d75e120b6f660929ea50240463937ae1c4b118f7 (For s390x architecture) The image digest is sha256:907e10c7c312b21ba21efa0bf9610da3d69a97173eefba4510699a86c27b4b1d (For ppc64le architecture) The image digest is sha256:d08e99e6ab216fda7fc09188df598ebedb315b49680d6490e9df0b42ab4d5e0a (For aarch64 architecture) The image digest is sha256:9e1da5b54dab49265e57f7e95a7c912f2ad0d32dc6b013def90cb045fd1510b3 All 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 https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html-single/updating_clusters/index#updating-cluster-cli. https://access.redhat.com/errata/RHSA-2026:5127
Workaround There's no known mitigation available for this vulnerability.
References
Acknowledgments
Simon Hall
To clipboard 

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            "baseScore": 6.5,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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          "text": "A Use-After-Free vulnerability has been discovered in GRUB\u0027s gettext module. This flaw stems from a programming error where the gettext command remains registered in memory after its module is unloaded. An attacker can exploit this condition by invoking the orphaned command, causing the application to access a memory location that is no longer valid. An attacker could exploit this vulnerability to cause grub to crash, leading to a Denial of Service. Possible data integrity or confidentiality compromise is not discarded.",
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        {
          "category": "other",
          "text": "This vulnerability has been rated as have the impact of Moderate by the Red Hat Product Security team. This decision was made based in the fact an attacker needs local or physical access to the machine, to execute the gettext command after it was unloaded. Additionally the most likely outcome from an successful attack is a Denial of Crash by leading the grub2 to crash.",
          "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-4.18:rhcos-aarch64-418.94.202603181125-0",
          "9Base-RHOSE-4.18:rhcos-ppc64le-418.94.202603181125-0",
          "9Base-RHOSE-4.18:rhcos-s390x-418.94.202603181125-0",
          "9Base-RHOSE-4.18:rhcos-x86_64-418.94.202603181125-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-61662"
        },
        {
          "category": "external",
          "summary": "RHBZ#2414683",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2414683"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-61662",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-61662"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-61662",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61662"
        },
        {
          "category": "external",
          "summary": "https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html",
          "url": "https://lists.gnu.org/archive/html/grub-devel/2025-11/msg00155.html"
        }
      ],
      "release_date": "2025-11-18T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-03-25T04:59:06+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 update:\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 sha256:7486ca2ec3bce0ee41dd2c03d75e120b6f660929ea50240463937ae1c4b118f7\n\n      (For s390x architecture)\n      The image digest is sha256:907e10c7c312b21ba21efa0bf9610da3d69a97173eefba4510699a86c27b4b1d\n\n      (For ppc64le architecture)\n      The image digest is sha256:d08e99e6ab216fda7fc09188df598ebedb315b49680d6490e9df0b42ab4d5e0a\n\n      (For aarch64 architecture)\n      The image digest is sha256:9e1da5b54dab49265e57f7e95a7c912f2ad0d32dc6b013def90cb045fd1510b3\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 https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.18:rhcos-aarch64-418.94.202603181125-0",
            "9Base-RHOSE-4.18:rhcos-ppc64le-418.94.202603181125-0",
            "9Base-RHOSE-4.18:rhcos-s390x-418.94.202603181125-0",
            "9Base-RHOSE-4.18:rhcos-x86_64-418.94.202603181125-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:5127"
        },
        {
          "category": "workaround",
          "details": "There\u0027s no known mitigation available for this vulnerability.",
          "product_ids": [
            "9Base-RHOSE-4.18:rhcos-aarch64-418.94.202603181125-0",
            "9Base-RHOSE-4.18:rhcos-ppc64le-418.94.202603181125-0",
            "9Base-RHOSE-4.18:rhcos-s390x-418.94.202603181125-0",
            "9Base-RHOSE-4.18:rhcos-x86_64-418.94.202603181125-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.18:rhcos-aarch64-418.94.202603181125-0",
            "9Base-RHOSE-4.18:rhcos-ppc64le-418.94.202603181125-0",
            "9Base-RHOSE-4.18:rhcos-s390x-418.94.202603181125-0",
            "9Base-RHOSE-4.18:rhcos-x86_64-418.94.202603181125-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "grub2: Missing unregister call for gettext command may lead to use-after-free"
    }
  ]
}


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Tags
Taxonomy of the tags.




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.