[ubuntu/resolute-security] util-linux 2.41.3-3ubuntu2.2 (Accepted)

[Marc Deslauriers]

util-linux (2.41.3-3ubuntu2.2) resolute-security; urgency=medium

  * SECURITY UPDATE: Heap use-after-free via crafted block device image
    - debian/patches/CVE-2026-13595.patch: libblkid: fix use-after-free in
      nested partition probing in libblkid/src/partitions/partitions.c.
    - CVE-2026-13595
  * SECURITY UPDATE: TOCTOU in mount utility
    - debian/patches/CVE-2026-27456.patch: loopdev: add LOOPDEV_FL_NOFOLLOW to
      prevent symlink attacks in include/loopdev.h, lib/loopdev.c,
      libmount/src/hook_loopdev.c.
    - CVE-2026-27456
  * SECURITY UPDATE: Improper hostname canonicalization in login
    - debian/patches/CVE-2026-3184.patch: login: use original FQDN for PAM_RHOST
      in login-utils/login.c.
    - CVE-2026-3184
  * SECURITY UPDATE: Local Privilege Escalation via TOCTOU in mount
    - debian/patches/CVE-2026-53612.patch: libmount: use fd-based fchownat/chmod
      in hook_owner in libmount/src/hook_owner.c.
    - CVE-2026-53612
  * SECURITY UPDATE: Another local Privilege Escalation via TOCTOU in mount
    - debian/patches/CVE-2026-53613-pre1.patch: lib/fileutils: add
      ul_open_no_symlinks() in configure.ac, include/fileutils.h,
      lib/fileutils.c, meson.build.
    - debian/patches/CVE-2026-53613.patch: libmount: add fd_target to context
      for TOCTOU prevention in libmount/src/context.c,
      libmount/src/context_mount.c, libmount/src/hook_mount.c,
      libmount/src/hook_mount_legacy.c, libmount/src/mountP.h.
    - CVE-2026-53613
  * SECURITY UPDATE: Local Privilege Escalation via LIBMOUNT_FORCE_MOUNT2
    Environment Variable
    - debian/patches/CVE-2026-53614.patch: libmount: fix SUID bypass via
      LIBMOUNT_FORCE_MOUNT2 and legacy mount path in libmount/src/hook_mount.c,
      libmount/src/hook_mount_legacy.c.
    - CVE-2026-53614
  * SECURITY UPDATE: Integer Overflow or Wraparound in dos.c
    - debian/patches/CVE-2026-53615.patch: libblkid: dos: validate EBR data and
      links within extended partition in libblkid/src/partitions/dos.c.
    - CVE-2026-53615
  * debian/patches/tests-fincore-force-the-use-of-GNU-dd-over-uutils.patch:
    fix ftbfs on arm64 and armhf.

Date: 2026-08-20 21:57:11.350911+00:00
Changed-By: Marc Deslauriers <marc.deslauriers at canonical.com>
https://launchpad.net/ubuntu/+source/util-linux/2.41.3-3ubuntu2.2
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