RHSA-2026:66376

Vulnerability from csaf_redhat - Published: 2026-09-15 10:01 - Updated: 2026-09-30 23:28
Summary
Red Hat Security Advisory: OpenShift Container Platform 4.20.38 bug fix and security update
Severity
Important
Notes
Topic: Red Hat OpenShift Container Platform release 4.20.38 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 4.20.38. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHSA-2026:66375 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): * kernel: netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry (CVE-2026-43114) 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.
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-2026-43114

A flaw was found in the Linux kernel's netfilter component, specifically within the `nft_set_pipapo_avx2` AVX2 matching functions. This vulnerability occurs when a `pipapo` set with an 'ipv4 . port' key is reloaded. Due to incorrect masking, the system may erroneously identify non-matching elements as duplicates, leading to data integrity issues and unexpected behavior. A remote attacker could potentially exploit this to cause a denial of service or impact data integrity.

8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE-480 - Use of Incorrect Operator
Affected products
Product Identifier Version Remediation
Unresolved product id: 9Base-RHOSE-4.20:rhcos-aarch64-4.20.9.6.202609092300-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202609092300-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202609092300-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202609092300-0 —
Vendor Fix fix
Workaround
Threats
Impact Important
References
To clipboard 

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        "text": "Red Hat OpenShift Container Platform release 4.20.38 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 4.20.\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.",
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        "name": "Use of Incorrect Operator"
      },
      "discovery_date": "2026-05-06T00:00:00+00:00",
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          "text": "2466994"
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          "text": "A flaw was found in the Linux kernel\u0027s netfilter component, specifically within the `nft_set_pipapo_avx2` AVX2 matching functions. This vulnerability occurs when a `pipapo` set with an \u0027ipv4 . port\u0027 key is reloaded. Due to incorrect masking, the system may erroneously identify non-matching elements as duplicates, leading to data integrity issues and unexpected behavior. A remote attacker could potentially exploit this to cause a denial of service or impact data integrity.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: netfilter: nft_set_pipapo_avx2: don\u0027t return non-matching entry on expiry",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important flaw in the Linux kernel\u0027s netfilter component, specifically within the `nft_set_pipapo_avx2` functionality. Incorrect processing during AVX2 matching operations can lead to misidentification of network data entries, potentially causing unexpected network filtering behavior and data integrity problems. This issue primarily impacts Red Hat Enterprise Linux 9 and 10 systems configured to utilize AVX2 instructions for netfilter set processing.",
          "title": "Statement"
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        {
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          "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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          "summary": "https://lore.kernel.org/linux-cve-announce/2026050626-CVE-2026-43114-5deb@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026050626-CVE-2026-43114-5deb@gregkh/T"
        }
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      "release_date": "2026-05-06T00:00:00+00:00",
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          "category": "vendor_fix",
          "date": "2026-09-15T10:01:22+00:00",
          "details": "For OpenShift Container Platform 4.20 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/4.20/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\nsha256:3f0d4394db6d0248681f0cb1ca1f724d3a9030cd8fe39d24d9a6b6bd1e08c410\n\n      (For s390x architecture)\n      The image digest is\nsha256:b0ea40ef98999507e414966718a874807ebcc87682f486826d88ca85948b92b8\n\n      (For ppc64le architecture)\n      The image digest is\nsha256:51c9d537744592a8e76365293adc80622aeab54d7e141fe67b29d17294607dd6\n\n      (For aarch64 architecture)\n      The image digest is\nsha256:3c52d4f3e5b4525fb7cbafe696b2f19dc4fcad78b894ff62c3791883896c5a62\n\nAll OpenShift Container Platform 4.20 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/4.20/html-single/updating_clusters/index#updating-cluster-cli.",
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          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:66376"
        },
        {
          "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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            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202609092300-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
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            "9Base-RHOSE-4.20:rhcos-ppc64le-4.20.9.6.202609092300-0",
            "9Base-RHOSE-4.20:rhcos-s390x-4.20.9.6.202609092300-0",
            "9Base-RHOSE-4.20:rhcos-x86_64-4.20.9.6.202609092300-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: netfilter: nft_set_pipapo_avx2: don\u0027t return non-matching entry on expiry"
    }
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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