CVE-2026-53614

util-linux is a random collection of Linux utilities. In util-linux 2.39.1 through 2.41.4 and 2.42 through 2.42.1, the SUID mount utility reads the attacker-controlled LIBMOUNTFORCEMOUNT2 environment variable with getenv, allowing a local low-privileged user to force the non-atomic legacy...

Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : util-linux vulnerabilities (USN-8702-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8702-1 advisory. It was discovered that libblkid in util-linux had a heap use-after-free vulnerability during nested partition probing. An attacke...

Rocky Linux 8.6 [CIQ] Security Update: libblkid / libblkid-devel / libfdisk / libfdisk-devel / libmount / etc (ciqsa-2026_1602)

The Rocky Linux 8.6 host has packages installed that are affected by a vulnerability as referenced in the CIQ ciqsa-20261602 advisory. This advisory aggregates security fixes for the util-linux SRPM in CIQ LTS 8.6. It addresses 1 CVE: CVE-2014-9114. Tenable has extracted the preceding description...

CLEANSTART-2026-GD03162 logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem

Security vulnerability affects the util-linux package. A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem...

CLEANSTART-2026-WY70417 logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem

Security vulnerability affects the util-linux package. A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem...

CentOS Linux 7.9 [CIQ] Security Update: libblkid / libblkid-devel / libmount / libmount-devel / etc (ciqsa-2026_0693)

The CentOS Linux 7.9 host has packages installed that are affected by a vulnerability as referenced in the CIQ ciqsa-20260693 advisory. This advisory aggregates security fixes for the util-linux SRPM in CIQ CentOS Bridge 7.9. It addresses 1 CVE: CVE-2016-2779. Tenable has extracted the preceding...

Rocky Linux 9.6 [CIQ] Security Update: libblkid / libblkid-devel / libfdisk / libfdisk-devel / libmount / etc Multiple Vulnerabilities (ciqsa-2026_1400)

The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-20261400 advisory. This advisory aggregates security fixes for the util-linux SRPM in CIQ LTS 9.6. It addresses 5 CVEs: CVE-2021-3995, CVE-2021-3996, CVE-2022-0563,...

SUSE-SU-2026:23870-1 Security update for util-linux

This update for util-linux fixes the following issues: - CVE-2026-13595: heap use-after-free in libblkid nested partition probing bsc1269583. - CVE-2026-27456: TOCTOU in the mount program when setting up loop devices bsc1261606. - CVE-2026-53612: local privilege escalation via TOCTOU in mount8...

util-linux libmount Privilege Escalation via Failed Mount Helper

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util-linux: util-linux: failed external mount helper still runs privileged X-mount post-hooks

When an external mount. helper runs but exits with a nonzero status, libmount still treats the helper invocation as successful and runs privileged post-mount hooks. A local unprivileged user with an /etc/fstab entry that uses the user option together with X-mount.idmap or X-mount.owner/group/mode...

CVE-2026-76642 util-linux libmount Privilege Escalation via Failed Mount Helper

util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with...

CVE-2026-76642

util-linux (libmount component) versions through 2.41.5 and 2.42.2 fail to check the exit status of an external mount helper before executing privileged post-mount hooks. A local unprivileged user with an /etc/fstab entry using the user option combined with X-mount.idmap or X-mount.owner/group/mo...

CVE-2026-76642 util-linux libmount Privilege Escalation via Failed Mount Helper

util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with...

CVE-2026-76642 util-linux libmount Privilege Escalation via Failed Mount Helper

util-linux versions through 2.41.5 and 2.42.2 fail to check mount helper exit status before running post-mount hooks, allowing unprivileged users to execute privileged operations on pre-existing filesystems. Attackers can exploit X-mount.idmap or X-mount.owner hooks to clone filesystems with...

CVE-2026-76642

When an external mount. helper runs but exits with a nonzero status, libmount still treats the helper invocation as successful and runs privileged post-mount hooks. A local unprivileged user with an /etc/fstab entry that uses the user option together with X-mount.idmap or X-mount.owner/group/mode...

USN-8702-1: util-linux vulnerabilities

It was discovered that libblkid in util-linux had a heap use-after-free vulnerability during nested partition probing. An attacker who could present a crafted block device image could possibly use this issue to obtain sensitive information or cause a denial of service. CVE-2026-13595 It was...

USN-8702-1 util-linux vulnerabilities

It was discovered that libblkid in util-linux had a heap use-after-free vulnerability during nested partition probing. An attacker who could present a crafted block device image could possibly use this issue to obtain sensitive information or cause a denial of service. CVE-2026-13595 It was...

Fedora 43 : util-linux (2026-a7ff7017ee)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-a7ff7017ee advisory. upstream upgrade with security fixes: - CVE-2026-53612 - libmount: TOCTOU attack via ancestor directory swap during mount - CVE-2026-53613 - libmoun...

Fedora 44 : util-linux (2026-c70cb96ff1)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c70cb96ff1 advisory. upstream upgrade with security fixes: - CVE-2026-53612 - libmount: TOCTOU attack via ancestor directory swap during mount - CVE-2026-53613 - libmoun...

UBUNTU-CVE-2026-53614

util-linux is a random collection of Linux utilities. In util-linux 2.39.1 through 2.41.4 and 2.42 through 2.42.1, the SUID mount utility reads the attacker-controlled LIBMOUNTFORCEMOUNT2 environment variable with getenv, allowing a local low-privileged user to force the non-atomic legacy...