An update for util-linux is now available for openEuler-24.03-LTS-SP1 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-3980 Final 1.0 1.0 2026-09-20 Initial 2026-09-20 2026-09-20 openEuler SA Tool V1.0 2026-09-20 util-linux security update An update for util-linux is now available for openEuler-24.03-LTS-SP1 The util-linux package contains a random collection of files that implements some low-level basic linux utilities. Security Fix(es): CVE-2026-53612 has no publicly disclosed vulnerability details yet. It is only indexed by the Snyk data source. Details are pending disclosure.(CVE-2026-53612) When an /etc/fstab entry is configured with the user or users option, mount(8) validates the target path before performing the mount syscall, creating a Time-of-Check-Time-of-Use (TOCTOU) window. A local unprivileged user with write access to an ancestor directory of the mount target can swap that directory to redirect the mount to an arbitrary root-owned location, potentially escalating privileges to root.(CVE-2026-53613) A flaw was found in util-linux. The mount(8) SUID binary does not sanitize the LIBMOUNT_FORCE_MOUNT2 environment variable before use. A local unprivileged user can set this variable to force mount(8) to use the legacy two-step mount(2) code path, which applies security restrictions such as nosuid and noexec after the mount is already active. During this window, an attacker can execute a SUID binary from the mounted filesystem, allowing local privilege escalation to root. Affected versions: util-linux v2.39.1 through v2.43-devel (current master).(CVE-2026-53614) A flaw was found in util-linux. Restricted bind mounts take the source path from fstab but do not pin that source before the privileged mount. A local unprivileged user who can replace the authorized source or a writable ancestor can redirect SUID mount(8) to bind another host directory. If the fstab entry also sets X-mount.owner, X-mount.group, or X-mount.mode, root then changes ownership or mode on that redirected inode.(CVE-2026-78410) An update for util-linux is now available for openEuler-24.03-LTS-SP1. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High util-linux https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3980 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-53612 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-53613 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-53614 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-78410 https://nvd.nist.gov/vuln/detail/CVE-2026-53612 https://nvd.nist.gov/vuln/detail/CVE-2026-53613 https://nvd.nist.gov/vuln/detail/CVE-2026-53614 https://nvd.nist.gov/vuln/detail/CVE-2026-78410 openEuler-24.03-LTS-SP1 util-linux-2.39.1-44.oe2403sp1.src.rpm util-linux-help-2.39.1-44.oe2403sp1.noarch.rpm libblkid-2.39.1-44.oe2403sp1.aarch64.rpm libfdisk-2.39.1-44.oe2403sp1.aarch64.rpm libmount-2.39.1-44.oe2403sp1.aarch64.rpm libsmartcols-2.39.1-44.oe2403sp1.aarch64.rpm libuuid-2.39.1-44.oe2403sp1.aarch64.rpm python3-libmount-2.39.1-44.oe2403sp1.aarch64.rpm util-linux-2.39.1-44.oe2403sp1.aarch64.rpm util-linux-debuginfo-2.39.1-44.oe2403sp1.aarch64.rpm util-linux-debugsource-2.39.1-44.oe2403sp1.aarch64.rpm util-linux-devel-2.39.1-44.oe2403sp1.aarch64.rpm util-linux-user-2.39.1-44.oe2403sp1.aarch64.rpm uuidd-2.39.1-44.oe2403sp1.aarch64.rpm libblkid-2.39.1-44.oe2403sp1.x86_64.rpm libfdisk-2.39.1-44.oe2403sp1.x86_64.rpm libmount-2.39.1-44.oe2403sp1.x86_64.rpm libsmartcols-2.39.1-44.oe2403sp1.x86_64.rpm libuuid-2.39.1-44.oe2403sp1.x86_64.rpm python3-libmount-2.39.1-44.oe2403sp1.x86_64.rpm util-linux-2.39.1-44.oe2403sp1.x86_64.rpm util-linux-debuginfo-2.39.1-44.oe2403sp1.x86_64.rpm util-linux-debugsource-2.39.1-44.oe2403sp1.x86_64.rpm util-linux-devel-2.39.1-44.oe2403sp1.x86_64.rpm util-linux-user-2.39.1-44.oe2403sp1.x86_64.rpm uuidd-2.39.1-44.oe2403sp1.x86_64.rpm CVE-2026-53612 has no publicly disclosed vulnerability details yet. It is only indexed by the Snyk data source. Details are pending disclosure. 2026-09-20 CVE-2026-53612 openEuler-24.03-LTS-SP1 High 7.0 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H util-linux security update 2026-09-20 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3980 When an /etc/fstab entry is configured with the user or users option, mount(8) validates the target path before performing the mount syscall, creating a Time-of-Check-Time-of-Use (TOCTOU) window. A local unprivileged user with write access to an ancestor directory of the mount target can swap that directory to redirect the mount to an arbitrary root-owned location, potentially escalating privileges to root. 2026-09-20 CVE-2026-53613 openEuler-24.03-LTS-SP1 High 7.0 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H util-linux security update 2026-09-20 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3980 A flaw was found in util-linux. The mount(8) SUID binary does not sanitize the LIBMOUNT_FORCE_MOUNT2 environment variable before use. A local unprivileged user can set this variable to force mount(8) to use the legacy two-step mount(2) code path, which applies security restrictions such as nosuid and noexec after the mount is already active. During this window, an attacker can execute a SUID binary from the mounted filesystem, allowing local privilege escalation to root. Affected versions: util-linux v2.39.1 through v2.43-devel (current master). 2026-09-20 CVE-2026-53614 openEuler-24.03-LTS-SP1 High 7.0 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H util-linux security update 2026-09-20 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3980 A flaw was found in util-linux. Restricted bind mounts take the source path from fstab but do not pin that source before the privileged mount. A local unprivileged user who can replace the authorized source or a writable ancestor can redirect SUID mount(8) to bind another host directory. If the fstab entry also sets X-mount.owner, X-mount.group, or X-mount.mode, root then changes ownership or mode on that redirected inode. 2026-09-20 CVE-2026-78410 openEuler-24.03-LTS-SP1 High 7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H util-linux security update 2026-09-20 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3980