RHSA-2026:71440

Vulnerability from csaf_redhat - Published: 2026-09-30 12:01 - Updated: 2026-09-30 16:40
Summary
Red Hat Security Advisory: OpenShift Container Platform 4.19.49 bug fix and security update
Severity
Important
Notes
Topic: Red Hat OpenShift Container Platform release 4.19.49 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 4.19. 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 4.19.49. There is no advisory for the RPM packages for this release. 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/4.19/html/release_notes/ Security Fix(es): * acl: Symlink traversal privilege escalation via libacl functions (CVE-2026-54369) * openssh: OpenSSH: Use-after-free vulnerability during host key re-exchange on the client side (CVE-2026-60002) 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 4.19 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/4.19/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-2026-54369

A flaw was found in the `acl` package, specifically within its `libacl` pathname-based functions. A local attacker could exploit this vulnerability by using a symbolic link to replace a pathname component. This could allow the attacker to redirect access control list (ACL) read or write operations to arbitrary files or directories, leading to unauthorized manipulation of ACLs and ultimately local privilege escalation.

7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Affected products
Product Identifier Version Remediation
Unresolved product id: 9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202609221245-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202609221245-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202609221245-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202609221245-0 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-60002

A flaw was found in OpenSSH. A remote attacker could exploit a use-after-free vulnerability on the client side when a server changes its host key during a key re-exchange. This could lead to high impact on confidentiality and integrity, and low impact on availability.

7.7 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CWE-825 - Expired Pointer Dereference
Affected products
Fixed 4 products, the same list as for CVE-2026-54369
Threats
Impact Important
References
Acknowledgments
Andrew Tridgell <tridge60@gmail.com> Alexander Peslyak <solar@openwall.com>
To clipboard 

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          "title": "Vulnerability description"
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          "text": "acl: Symlink traversal privilege escalation via libacl functions",
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          "text": "Red Hat rates this flaw as Important because a local attacker who controls any component of a pathname processed by a privileged process using libacl can redirect ACL operations to arbitrary files. Exploitation requires local access with the ability to create symlinks in a directory that a privileged program later processes with acl_get_file() or acl_set_file(). In default RHEL and OpenShift CoreOS configurations, standard file permission settings limit where unprivileged users can create symlinks, reducing the practical attack surface. Programs that operate on user-supplied paths with elevated privileges are most at risk.",
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          "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\nsha256:0aecc463d262ccbeb2c107d5a35d3f2c42904c6844403074390a576c76658e9a\n\n      (For s390x architecture)\n      The image digest is\nsha256:594340955cc223d6b931b984994e49b5b7fabb06c4b59562596c8a15582e4c3b\n\n      (For ppc64le architecture)\n      The image digest is\nsha256:ef82b483578322578e1b6366fb30d0a6c1040c0ebd697735fe21dd5554401ae5\n\n      (For aarch64 architecture)\n      The image digest is\nsha256:9225274bdd4c71d351a4ff5d58a391e89a5bb1bba4616fae21f89b4ba8552c69\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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          "details": "Restrict unprivileged users from creating symlinks in directories that privileged processes operate on with ACL commands. Where possible, use the fs.protected_symlinks sysctl (enabled by default on RHEL 7+), which prevents symlink following in world-writable sticky directories unless the owner of the symlink matches the owner of the target file or directory.",
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            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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            "version": "3.1"
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          "details": "Important"
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      ],
      "title": "acl: Symlink traversal privilege escalation via libacl functions"
    },
    {
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      "cwe": {
        "id": "CWE-825",
        "name": "Expired Pointer Dereference"
      },
      "discovery_date": "2026-07-08T01:01:33.808610+00:00",
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          "text": "2497936"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in OpenSSH. A remote attacker could exploit a use-after-free vulnerability on the client side when a server changes its host key during a key re-exchange. This could lead to high impact on confidentiality and integrity, and low impact on availability.",
          "title": "Vulnerability description"
        },
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          "text": "openssh: OpenSSH: Use-after-free vulnerability during host key re-exchange on the client side",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Important flaw in OpenSSH client could allow a malicious SSH server to execute arbitrary code on the connecting client due to a use-after-free vulnerability during host key re-exchange. While requiring a connection to a specially crafted server, the potential for high impact on client confidentiality and integrity elevates the severity beyond Moderate.",
          "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-2026-60002",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-60002"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-60002",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-60002"
        },
        {
          "category": "external",
          "summary": "https://marc.info/?l=openssh-unix-dev\u0026m=178333966933090\u0026w=2",
          "url": "https://marc.info/?l=openssh-unix-dev\u0026m=178333966933090\u0026w=2"
        },
        {
          "category": "external",
          "summary": "https://www.openssh.org/releasenotes.html#10.4p1",
          "url": "https://www.openssh.org/releasenotes.html#10.4p1"
        },
        {
          "category": "external",
          "summary": "https://www.openwall.com/lists/oss-security/2026/07/06/5",
          "url": "https://www.openwall.com/lists/oss-security/2026/07/06/5"
        }
      ],
      "release_date": "2026-07-08T00:17:33.058000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-30T12:01:25+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\nsha256:0aecc463d262ccbeb2c107d5a35d3f2c42904c6844403074390a576c76658e9a\n\n      (For s390x architecture)\n      The image digest is\nsha256:594340955cc223d6b931b984994e49b5b7fabb06c4b59562596c8a15582e4c3b\n\n      (For ppc64le architecture)\n      The image digest is\nsha256:ef82b483578322578e1b6366fb30d0a6c1040c0ebd697735fe21dd5554401ae5\n\n      (For aarch64 architecture)\n      The image digest is\nsha256:9225274bdd4c71d351a4ff5d58a391e89a5bb1bba4616fae21f89b4ba8552c69\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-aarch64-4.19.9.6.202609221245-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202609221245-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202609221245-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202609221245-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:71440"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, OpenSSH clients should only connect to trusted SSH servers. Enforcing strict host key checking and carefully managing `known_hosts` files can help prevent connections to servers with unexpected or altered host keys, thereby reducing exposure to this client-side vulnerability.",
          "product_ids": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202609221245-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202609221245-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202609221245-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202609221245-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.19:rhcos-aarch64-4.19.9.6.202609221245-0",
            "9Base-RHOSE-4.19:rhcos-ppc64le-4.19.9.6.202609221245-0",
            "9Base-RHOSE-4.19:rhcos-s390x-4.19.9.6.202609221245-0",
            "9Base-RHOSE-4.19:rhcos-x86_64-4.19.9.6.202609221245-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "openssh: OpenSSH: Use-after-free vulnerability during host key re-exchange on the client side"
    }
  ]
}



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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

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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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.