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Security update for util-linux

Type: advisorySource: OSV1 source record

This update for util-linux fixes the following issues: - CVE-2026-13595: heap use-after-free in `libblkid` nested partition probing (bsc#1269583). - CVE-2026-27456: TOCTOU in the mount program when setting up loop devices (bsc#1261606). - CVE-2026-53612: local privilege escalation via TOCTOU in mount(8) hook_owner.c chmod/chown (bsc#1268886). - CVE-2026-53613: local privilege escalation via TOCTOU in mount(8) - Target Path Redirection (bsc#1268886). - CVE-2026-53614: local privilege escalation via LIBMOUNT_FORCE_MOUNT2 Environment Variable - nosuid/noexec Bypass in SUID mount(8) (bsc#1268886). - CVE-2026-76642: failed external mount helper triggers privileged `X-mount` post-hooks, which enables local privilege escalation (bsc#1278349). - CVE-2026-78408: `nsenter --join-cgroup` leaks root `cgroup` migration authority, which allows for migration or termination of root processes (bsc#1278348). - CVE-2026-78410: restricted `bind` mounts do not pin the source, which allows for `X-mount.owner`/`group`/`mode` redirection (bsc#1278347). Changes for util-linux: - lib/fileutils: add ul_openat_resolve() openat2 wrapper (bsc#1275441) - lib/fileutils: fix RESOLVE_NO_SYMLINKS fallback value - lib/fileutils: fix unused parameter warnings without SYS_openat2 - libmount: add missing fileutils.h include to hook_idmap.c - libmount: add mnt_open_tree() helper for safe tree opening - libmount: pin source path with openat2() for restricted users (bsc#1275441, bsc#1278347, CVE-2026-78410) - libmoun

Announced Group revision 1
Original source ↗

SUSE-SU-2026:23870-1

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:SUSE-SU-2026:23870-1

python-libmount

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
2.41.1-160000.5.1

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

util-linux

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
2.41.1-160000.5.1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

util-linux-systemd

Source reference: /affected/2/package/name

Affected versions
Not stated in this record
Fixed versions
2.41.1-160000.5.1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

python-libmount

Source reference: /affected/3/package/name

Affected versions
Not stated in this record
Fixed versions
2.41.1-160000.5.1

Source reference: /affected/3/ranges

Prerequisites
Not stated in this record

util-linux

Source reference: /affected/4/package/name

Affected versions
Not stated in this record
Fixed versions
2.41.1-160000.5.1

Source reference: /affected/4/ranges

Prerequisites
Not stated in this record

util-linux-systemd

Source reference: /affected/5/package/name

Affected versions
Not stated in this record
Fixed versions
2.41.1-160000.5.1

Source reference: /affected/5/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

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      "ecosystem": "SUSE:Linux Enterprise Server 16.0"
    },
    "database_specific": {
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    "ecosystem_specific": {
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      "ecosystem": "SUSE:Linux Enterprise Server for SAP applications 16.0"
    },
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    },
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        {
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          "libmount1": "2.41.1-160000.5.1",
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          "libfdisk-devel": "2.41.1-160000.5.1",
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          "python313-libmount": "2.41.1-160000.5.1",
          "util-linux-systemd": "2.41.1-160000.5.1",
          "libuuid-devel-static": "2.41.1-160000.5.1",
          "util-linux-tty-tools": "2.41.1-160000.5.1",
          "libblkid-devel-static": "2.41.1-160000.5.1",
          "libfdisk-devel-static": "2.41.1-160000.5.1",
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    }
  }
]

Publisher severity

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Event
#20015 · Revision 1
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Publisher date
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Revision history

  1. SUSE-SU-2026:23870-1 · Revision 1Source updated