Red Hat Security Advisory: util-linux security update

Fixed packages 48

Vulnerabilities 3

• High 8.0
  CVE-2026-53615

  util-linux libblkid DOS extended-partition overflow produces invalid partition metadata

  util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to th…

  util-linux util-linux util-linux util-linux Linux Debian Ubuntu Azure Linux
  Oct 14, 2026
• High 7.0
  CVE-2026-53613 Public exploit

  util-linux mount target TOCTOU allows local privilege escalation

  util-linux is a random collection of Linux utilities. In util-linux 2.17 through 2.41.6 and 2.42 through 2.42.3, and in 2.42.4 when the legacy `mount(2)` path is used without `/proc`, restricted non-root `mount` requests validate an `/etc/fstab` target before…

  util-linux util-linux util-linux util-linux Linux Debian Ubuntu Azure Linux Alpine
  Oct 14, 2026
• Medium 6.8
  CVE-2026-13595

  Util-linux: util-linux: heap use-after-free in libblkid nested partition probing

  A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition ad…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux
  Jun 29, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2494101
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2519646
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2552551
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_99119.json
• report
  https://access.redhat.com/security/cve/CVE-2026-13595
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-13595
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-13595
• article
  https://github.com/util-linux/util-linux/commit/c0186f14fbdb02f64c8e0ba701ce727ea764ff4c
• report
  https://access.redhat.com/security/cve/CVE-2026-53613
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-53613
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-53613
• article
  https://github.com/util-linux/util-linux/security/advisories/GHSA-8gj5-72r3-428g
• report
  https://access.redhat.com/security/cve/CVE-2026-53615
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-53615
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-53615
• article
  https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623
• article
  https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31
• article
  https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af
• article
  https://github.com/util-linux/util-linux/releases/tag/v2.41.4
• article
  https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5