RHSA-2026:29794

Vulnerability from csaf_redhat - Published: 2026-06-30 15:50 - Updated: 2026-07-03 00:52
Summary
Red Hat Security Advisory: OpenShift Container Platform 4.22.3 bug fix and security update
Severity
Important
Notes
Topic: Red Hat OpenShift Container Platform release 4.22.3 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 4.22. 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. 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/4.22/html/release_notes/ Security Fix(es): * gnutls: gnutls: Denial of Service via DTLS packet reordering vulnerability (CVE-2026-42009) * kernel: net/sched: act_pedit: extend the writable skb range per key (CVE-2026-46331) 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 4.22 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/4.22/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-2026-42009

A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-475 - Undefined Behavior for Input to API
Affected products
Product Identifier Version Remediation
Unresolved product id: 9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202606230855-0 —
Vendor Fix fix
Unresolved product id: 9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202606230855-0 —
Vendor Fix fix
Unresolved product id: 9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202606230855-0 —
Vendor Fix fix
Unresolved product id: 9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202606230855-0 —
Vendor Fix fix
Threats
Impact Important
CVE-2026-46331

A flaw was found in the Linux kernel's 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.

6.7 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE-787 - Out-of-bounds Write
Affected products
Product Identifier Version Remediation
Unresolved product id: 9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202606230855-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202606230855-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202606230855-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202606230855-0 —
Vendor Fix fix
Workaround
Threats
Impact Low
References
Acknowledgments
AISLE Research Team Joshua Rogers
To clipboard 

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          "details": "For OpenShift Container Platform 4.22 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/4.22/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:df94fff5219721391e48098e258d7bc8a645b1d635a1b65148dc29f2ecb749c8\n\n      (For s390x architecture)\n      The image digest is sha256:dfa06fb4060abd00d341c5b15448abeaaccf910935a21aae34c0c9ffb817cf54\n\n      (For ppc64le architecture)\n      The image digest is sha256:375e6cf29ce2223dc2306ea20f0d96dacdc231404347c3f11dac31c52adc5869\n\n      (For aarch64 architecture)\n      The image digest is sha256:4af39b7d98ee6644ceda05ec45ff395b3867816eab5f8d2dc130ffcea965020a\n\nAll OpenShift Container Platform 4.22 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/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
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      "title": "gnutls: gnutls: Denial of Service via DTLS packet reordering vulnerability"
    },
    {
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      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-05-18T06:17:23.219000+00:00",
      "ids": [
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          "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",
          "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": "2026-06-30T15:50:13+00:00",
          "details": "For OpenShift Container Platform 4.22 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/4.22/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:df94fff5219721391e48098e258d7bc8a645b1d635a1b65148dc29f2ecb749c8\n\n      (For s390x architecture)\n      The image digest is sha256:dfa06fb4060abd00d341c5b15448abeaaccf910935a21aae34c0c9ffb817cf54\n\n      (For ppc64le architecture)\n      The image digest is sha256:375e6cf29ce2223dc2306ea20f0d96dacdc231404347c3f11dac31c52adc5869\n\n      (For aarch64 architecture)\n      The image digest is sha256:4af39b7d98ee6644ceda05ec45ff395b3867816eab5f8d2dc130ffcea965020a\n\nAll OpenShift Container Platform 4.22 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/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202606230855-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202606230855-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202606230855-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202606230855-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:29794"
        },
        {
          "category": "workaround",
          "details": "See the security bulletin for a detailed mitigation procedure.",
          "product_ids": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202606230855-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202606230855-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202606230855-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202606230855-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202606230855-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202606230855-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202606230855-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202606230855-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "kernel: net/sched: act_pedit: extend the writable skb range per key"
    }
  ]
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.