SUSE-SU-2026:21399-1

Vulnerability from csaf_suse - Published: 2026-04-24 10:02 - Updated: 2026-04-24 10:02
Summary
Security update for the Linux Kernel (Live Patch 5 for SUSE Linux Enterprise 16)
Severity
Important
Notes
Title of the patch: Security update for the Linux Kernel (Live Patch 5 for SUSE Linux Enterprise 16)
Description of the patch: This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.26.1 fixes one security issue The following security issue was fixed: - CVE-2026-23268: apparmor: fix unprivileged local user can do privileged policy management (bsc#1259859).
Patchnames: SUSE-SLES-16.0-638
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2026-23268
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
References
To clipboard 

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          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix unprivileged local user can do privileged policy management\n\nAn unprivileged local user can load, replace, and remove profiles by\nopening the apparmorfs interfaces, via a confused deputy attack, by\npassing the opened fd to a privileged process, and getting the\nprivileged process to write to the interface.\n\nThis does require a privileged target that can be manipulated to do\nthe write for the unprivileged process, but once such access is\nachieved full policy management is possible and all the possible\nimplications that implies: removing confinement, DoS of system or\ntarget applications by denying all execution, by-passing the\nunprivileged user namespace restriction, to exploiting kernel bugs for\na local privilege escalation.\n\nThe policy management interface can not have its permissions simply\nchanged from 0666 to 0600 because non-root processes need to be able\nto load policy to different policy namespaces.\n\nInstead ensure the task writing the interface has privileges that\nare a subset of the task that opened the interface. This is already\ndone via policy for confined processes, but unconfined can delegate\naccess to the opened fd, by-passing the usual policy check.",
          "title": "CVE description"
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            "baseSeverity": "HIGH",
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            "version": "3.1"
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            "SUSE Linux Enterprise Server for SAP applications 16.0:kernel-livepatch-6_12_0-160000_26-default-3-160000.1.1.s390x",
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          "date": "2026-04-24T10:02:01Z",
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        }
      ],
      "title": "CVE-2026-23268"
    }
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}


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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.



Detection rules are retrieved from Rulezet.