RLSA-2026:93461: util-linux security update

RLSA-2026:93461, released November 7, 2026, fixes 9 CVEs in util-linux (version 0:2.40.2-18.el10_2.20). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

8.0

Base score, 0 to 10

Highest EPSS

0.0024

14th percentile

Priority of the 9 CVEs

Patch now 0
                                Urgent 0
                                High 9
                                Routine 0

Fixed package versions

Product	Release	Fixed in
util-linux	rocky 10	0:2.40.2-18.el10_2.20

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-78408	Util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority	8.0	0.0024	None reported
High	CVE-2026-76642	util-linux libmount Privilege Escalation via Failed Mount Helper	8.0	0.0022	None reported
High	CVE-2026-78410	Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.owner/group/mode redirection	8.0	0.0020	None reported
High	CVE-2026-53615	util-linux libblkid DOS extended-partition overflow produces invalid partition metadata	8.0	0.0018	None reported
High	CVE-2026-53613	util-linux mount target TOCTOU allows local privilege escalation	8.0	0.0016	None reported
High	CVE-2026-27456	util-linux: TOCTOU Race Condition in util-linux mount(8) - Loop Device Setup	8.0	0.0016	None reported
High	CVE-2026-53612	util-linux mount hook_owner TOCTOU allows local privilege escalation	8.0	0.0015	None reported
High	CVE-2026-13595	util-linux: A flaw was found in the libblkid library of util-linux	8.0	0.0014	None reported
High	CVE-2026-53614	util-linux LIBMOUNT_FORCE_MOUNT2 allows nosuid and noexec bypass	8.0	0.0013	None reported

Also fixes CVE-2026-78408

ELSA-2026-93461
libblkid, libblkid-devel, libfdisk and 11 more on ol 10
ALSA-2026:93461
libblkid, libblkid-devel, libfdisk and 11 more on almalinux 10
RHSA-2026:93461
util-linux on RHEL 10
OPENSUSE-SU-2026:21905-1
python-libmount, util-linux, util-linux-systemd on opensuse-leap 16.0
SUSE-SU-2026:23870-1
python-libmount, util-linux, util-linux-systemd on sles 16.0
DEBIAN-CVE-2026-78408
util-linux on Debian 14

Vendor advisory

https://errata.rockylinux.org/RLSA-2026:93461

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