RHSA-2026:73851

Vulnerability from csaf_redhat - Published: 2026-10-08 21:01 - Updated: 2026-10-09 03:48
Summary
Red Hat Security Advisory: OpenShift Container Platform 4.16.72 bug fix update
Severity
Important
Notes
Topic: Red Hat OpenShift Container Platform release 4.16.72 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 4.16. 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 4.16.72. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHBA-2026:73850 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/4.16/html/release_notes/ Security Fix(es): * urllib3: urllib3: Unbounded decompression chain leads to resource exhaustion (CVE-2025-66418) * acl: Symlink traversal privilege escalation via libacl functions (CVE-2026-54369) * glib: off-by-one error in glib/gkeyfile.c via "g_key_file_get_locale_string_list" (CVE-2026-58014) 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 4.16 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/4.16/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-2025-66418

A flaw was found in urllib3 Python library that could lead to a Denial of Service condition. A remote, malicious server can exploit this flaw by responding to a client request with an HTTP message that uses an excessive number of chained compression algorithms. This unlimited decompression chain causes the client system to consume a virtually unbounded amount of CPU resources and memory. The high resource usage leads to service disruption, making the application unresponsive.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-770 - Allocation of Resources Without Limits or Throttling
Affected products
Product Identifier Version Remediation
Unresolved product id: 9Base-RHOSE-4.16:rhcos-aarch64-416.94.202609281908-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.16:rhcos-ppc64le-416.94.202609281908-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.16:rhcos-s390x-416.94.202609281908-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.16:rhcos-x86_64-416.94.202609281908-0 —
Vendor Fix fix
Workaround
Threats
Impact Important
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
Fixed 4 products, the same list as for CVE-2025-66418
Threats
Impact Important
CVE-2026-58014

A flaw was found in GLib. An off-by-one error can occur in the g_key_file_get_locale_string_list function in the gkeyfile.c file when loading a key file with an empty value. This flaw can cause an out-of-bounds access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundary.

7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE-193 - Off-by-one Error
Affected products
Fixed 4 products, the same list as for CVE-2025-66418
Threats
Impact Moderate
References
Acknowledgments
Andrew Tridgell <tridge60@gmail.com> Alexander Peslyak <solar@openwall.com>
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          "details": "For OpenShift Container Platform 4.16 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\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.16/html/release_notes/\n\nYou can download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests can 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)\nThe image digest is sha256:9cf7596b1c295a65f4b38d96f231690661869f496bc30dd002f07e31aac87f89\n\n(For s390x architecture)\nThe image digest is sha256:90ac5292f633ef445d838bf363b0b93328a7e371e4e14762764b71a868b2bc6b\n\n(For ppc64le architecture)\nThe image digest is sha256:a2326dc17aa9a3eb441e509fba8485e3f7e28a9c2515f5c85b5b9fcf226ef5cc\n\n(For aarch64 architecture)\nThe image digest is sha256:71f6c76d872323fca9ca822a86b3bcba426b13c5c7cd1b02fbb4c7bd0d389610\n\nAll OpenShift Container Platform 4.16 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/4.16/html-single/updating_clusters/index#updating-cluster-cli.",
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        },
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          "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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            "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",
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          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "urllib3: urllib3: Unbounded decompression chain leads to resource exhaustion"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Andrew Tridgell \u003ctridge60@gmail.com\u003e",
            "Alexander Peslyak \u003csolar@openwall.com\u003e"
          ]
        }
      ],
      "cve": "CVE-2026-54369",
      "cwe": {
        "id": "CWE-59",
        "name": "Improper Link Resolution Before File Access (\u0027Link Following\u0027)"
      },
      "discovery_date": "2026-06-16T23:47:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2490277"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "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.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "acl: Symlink traversal privilege escalation via libacl functions",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "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.",
          "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-4.16:rhcos-aarch64-416.94.202609281908-0",
          "9Base-RHOSE-4.16:rhcos-ppc64le-416.94.202609281908-0",
          "9Base-RHOSE-4.16:rhcos-s390x-416.94.202609281908-0",
          "9Base-RHOSE-4.16:rhcos-x86_64-416.94.202609281908-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-54369"
        },
        {
          "category": "external",
          "summary": "RHBZ#2490277",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2490277"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-54369",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-54369"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-54369",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54369"
        }
      ],
      "release_date": "2026-06-29T13:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-08T21:01:50+00:00",
          "details": "For OpenShift Container Platform 4.16 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\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.16/html/release_notes/\n\nYou can download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests can 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)\nThe image digest is sha256:9cf7596b1c295a65f4b38d96f231690661869f496bc30dd002f07e31aac87f89\n\n(For s390x architecture)\nThe image digest is sha256:90ac5292f633ef445d838bf363b0b93328a7e371e4e14762764b71a868b2bc6b\n\n(For ppc64le architecture)\nThe image digest is sha256:a2326dc17aa9a3eb441e509fba8485e3f7e28a9c2515f5c85b5b9fcf226ef5cc\n\n(For aarch64 architecture)\nThe image digest is sha256:71f6c76d872323fca9ca822a86b3bcba426b13c5c7cd1b02fbb4c7bd0d389610\n\nAll OpenShift Container Platform 4.16 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/4.16/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.16:rhcos-aarch64-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-ppc64le-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-s390x-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-x86_64-416.94.202609281908-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:73851"
        },
        {
          "category": "workaround",
          "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.",
          "product_ids": [
            "9Base-RHOSE-4.16:rhcos-aarch64-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-ppc64le-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-s390x-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-x86_64-416.94.202609281908-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 7.1,
            "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:N",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.16:rhcos-aarch64-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-ppc64le-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-s390x-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-x86_64-416.94.202609281908-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "acl: Symlink traversal privilege escalation via libacl functions"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "linhlhq"
          ]
        }
      ],
      "cve": "CVE-2026-58014",
      "cwe": {
        "id": "CWE-193",
        "name": "Off-by-one Error"
      },
      "discovery_date": "2026-06-24T17:16:25.796000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2492255"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in GLib. An off-by-one error can occur in the g_key_file_get_locale_string_list function in the gkeyfile.c file when loading a key file with an empty value. This flaw can cause an out-of-bounds access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundary.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "glib: off-by-one error in glib/gkeyfile.c via \"g_key_file_get_locale_string_list\"",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Any applications loading or parsing untrusted key files, typically .desktop or .ini files, are vulnerable to this issue. This flaw can cause an off-by-one error, leading to an out-of-bounds access of 1 byte or a denial of service when the out-of-bounds access crosses a page boundary. Due to these reasons, this vulnerability has been rated with a moderate severity.",
          "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-4.16:rhcos-aarch64-416.94.202609281908-0",
          "9Base-RHOSE-4.16:rhcos-ppc64le-416.94.202609281908-0",
          "9Base-RHOSE-4.16:rhcos-s390x-416.94.202609281908-0",
          "9Base-RHOSE-4.16:rhcos-x86_64-416.94.202609281908-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-58014"
        },
        {
          "category": "external",
          "summary": "RHBZ#2492255",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492255"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-58014",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-58014"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-58014",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58014"
        },
        {
          "category": "external",
          "summary": "https://gitlab.gnome.org/GNOME/glib/-/issues/3930",
          "url": "https://gitlab.gnome.org/GNOME/glib/-/issues/3930"
        }
      ],
      "release_date": "2026-04-07T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-08T21:01:50+00:00",
          "details": "For OpenShift Container Platform 4.16 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\nupdate:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.16/html/release_notes/\n\nYou can download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests can 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)\nThe image digest is sha256:9cf7596b1c295a65f4b38d96f231690661869f496bc30dd002f07e31aac87f89\n\n(For s390x architecture)\nThe image digest is sha256:90ac5292f633ef445d838bf363b0b93328a7e371e4e14762764b71a868b2bc6b\n\n(For ppc64le architecture)\nThe image digest is sha256:a2326dc17aa9a3eb441e509fba8485e3f7e28a9c2515f5c85b5b9fcf226ef5cc\n\n(For aarch64 architecture)\nThe image digest is sha256:71f6c76d872323fca9ca822a86b3bcba426b13c5c7cd1b02fbb4c7bd0d389610\n\nAll OpenShift Container Platform 4.16 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/4.16/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.16:rhcos-aarch64-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-ppc64le-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-s390x-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-x86_64-416.94.202609281908-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:73851"
        },
        {
          "category": "workaround",
          "details": "To mitigate this vulnerability, implement input validation to sanitize untrusted key files (such as .desktop or .ini files), specifically rejecting or stripping empty values before calling g_key_file_get_locale_string_list(). Alternatively, restricting the application to only load key files from trusted sources will completely neutralize this issue.",
          "product_ids": [
            "9Base-RHOSE-4.16:rhcos-aarch64-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-ppc64le-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-s390x-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-x86_64-416.94.202609281908-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.16:rhcos-aarch64-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-ppc64le-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-s390x-416.94.202609281908-0",
            "9Base-RHOSE-4.16:rhcos-x86_64-416.94.202609281908-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "glib: off-by-one error in glib/gkeyfile.c via \"g_key_file_get_locale_string_list\""
    }
  ]
}



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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

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.



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.