An update for util-linux is now available for openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS,openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP3 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-2211 Final 1.0 1.0 2026-05-09 Initial 2026-05-09 2026-05-09 openEuler SA Tool V1.0 2026-05-09 util-linux security update An update for util-linux is now available for openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS,openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP3 The util-linux package contains a random collection of files that implements some low-level basic linux utilities. Security Fix(es): util-linux is a random collection of Linux utilities. Prior to version 2.41.4, a TOCTOU (Time-of-Check-Time-of-Use) vulnerability has been identified in the SUID binary /usr/bin/mount from util-linux. The mount binary, when setting up loop devices, validates the source file path with user privileges via fork() + setuid() + realpath(), but subsequently re-canonicalizes and opens it with root privileges (euid=0) without verifying that the path has not been replaced between both operations. Neither O_NOFOLLOW, nor inode comparison, nor post-open fstat() are employed. This allows a local unprivileged user to replace the source file with a symlink pointing to any root-owned file or device during the race window, causing the SUID binary to open and mount it as root. Exploitation requires an /etc/fstab entry with user,loop options whose path points to a directory where the attacker has write permission, and that /usr/bin/mount has the SUID bit set (the default configuration on virtually all Linux distributions). The impact is unauthorized read access to root-protected files and block devices, including backup images, disk volumes, and any file containing a valid filesystem. This issue has been patched in version 2.41.4.(CVE-2026-27456) An update for util-linux is now available for openEuler-20.03-LTS-SP4,openEuler-22.03-LTS-SP4,openEuler-24.03-LTS,openEuler-24.03-LTS-SP1,openEuler-24.03-LTS-SP3. openEuler Security has rated this update as having a security impact of medium. 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. Medium util-linux https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2211 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-27456 https://nvd.nist.gov/vuln/detail/CVE-2026-27456 openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP3 util-linux-help-2.35.2-29.oe2003sp4.noarch.rpm util-linux-help-2.37.2-52.oe2203sp4.noarch.rpm util-linux-help-2.39.1-38.oe2403.noarch.rpm util-linux-help-2.39.1-38.oe2403sp1.noarch.rpm util-linux-help-2.39.1-38.oe2403sp3.noarch.rpm libblkid-2.35.2-29.oe2003sp4.aarch64.rpm libfdisk-2.35.2-29.oe2003sp4.aarch64.rpm libmount-2.35.2-29.oe2003sp4.aarch64.rpm libsmartcols-2.35.2-29.oe2003sp4.aarch64.rpm libuuid-2.35.2-29.oe2003sp4.aarch64.rpm python-libmount-2.35.2-29.oe2003sp4.aarch64.rpm util-linux-2.35.2-29.oe2003sp4.aarch64.rpm util-linux-debuginfo-2.35.2-29.oe2003sp4.aarch64.rpm util-linux-debugsource-2.35.2-29.oe2003sp4.aarch64.rpm util-linux-devel-2.35.2-29.oe2003sp4.aarch64.rpm util-linux-user-2.35.2-29.oe2003sp4.aarch64.rpm uuidd-2.35.2-29.oe2003sp4.aarch64.rpm libblkid-2.37.2-52.oe2203sp4.aarch64.rpm libfdisk-2.37.2-52.oe2203sp4.aarch64.rpm libmount-2.37.2-52.oe2203sp4.aarch64.rpm libsmartcols-2.37.2-52.oe2203sp4.aarch64.rpm libuuid-2.37.2-52.oe2203sp4.aarch64.rpm python3-libmount-2.37.2-52.oe2203sp4.aarch64.rpm util-linux-2.37.2-52.oe2203sp4.aarch64.rpm util-linux-debuginfo-2.37.2-52.oe2203sp4.aarch64.rpm util-linux-debugsource-2.37.2-52.oe2203sp4.aarch64.rpm util-linux-devel-2.37.2-52.oe2203sp4.aarch64.rpm util-linux-user-2.37.2-52.oe2203sp4.aarch64.rpm uuidd-2.37.2-52.oe2203sp4.aarch64.rpm libblkid-2.39.1-38.oe2403.aarch64.rpm libfdisk-2.39.1-38.oe2403.aarch64.rpm libmount-2.39.1-38.oe2403.aarch64.rpm libsmartcols-2.39.1-38.oe2403.aarch64.rpm libuuid-2.39.1-38.oe2403.aarch64.rpm python3-libmount-2.39.1-38.oe2403.aarch64.rpm util-linux-2.39.1-38.oe2403.aarch64.rpm util-linux-debuginfo-2.39.1-38.oe2403.aarch64.rpm util-linux-debugsource-2.39.1-38.oe2403.aarch64.rpm util-linux-devel-2.39.1-38.oe2403.aarch64.rpm util-linux-user-2.39.1-38.oe2403.aarch64.rpm uuidd-2.39.1-38.oe2403.aarch64.rpm libblkid-2.39.1-38.oe2403sp1.aarch64.rpm libfdisk-2.39.1-38.oe2403sp1.aarch64.rpm libmount-2.39.1-38.oe2403sp1.aarch64.rpm libsmartcols-2.39.1-38.oe2403sp1.aarch64.rpm libuuid-2.39.1-38.oe2403sp1.aarch64.rpm python3-libmount-2.39.1-38.oe2403sp1.aarch64.rpm util-linux-2.39.1-38.oe2403sp1.aarch64.rpm util-linux-debuginfo-2.39.1-38.oe2403sp1.aarch64.rpm util-linux-debugsource-2.39.1-38.oe2403sp1.aarch64.rpm util-linux-devel-2.39.1-38.oe2403sp1.aarch64.rpm util-linux-user-2.39.1-38.oe2403sp1.aarch64.rpm uuidd-2.39.1-38.oe2403sp1.aarch64.rpm libblkid-2.39.1-38.oe2403sp3.aarch64.rpm libfdisk-2.39.1-38.oe2403sp3.aarch64.rpm libmount-2.39.1-38.oe2403sp3.aarch64.rpm libsmartcols-2.39.1-38.oe2403sp3.aarch64.rpm libuuid-2.39.1-38.oe2403sp3.aarch64.rpm python3-libmount-2.39.1-38.oe2403sp3.aarch64.rpm util-linux-2.39.1-38.oe2403sp3.aarch64.rpm util-linux-debuginfo-2.39.1-38.oe2403sp3.aarch64.rpm util-linux-debugsource-2.39.1-38.oe2403sp3.aarch64.rpm util-linux-devel-2.39.1-38.oe2403sp3.aarch64.rpm util-linux-user-2.39.1-38.oe2403sp3.aarch64.rpm uuidd-2.39.1-38.oe2403sp3.aarch64.rpm libblkid-2.35.2-29.oe2003sp4.x86_64.rpm libfdisk-2.35.2-29.oe2003sp4.x86_64.rpm libmount-2.35.2-29.oe2003sp4.x86_64.rpm libsmartcols-2.35.2-29.oe2003sp4.x86_64.rpm libuuid-2.35.2-29.oe2003sp4.x86_64.rpm python-libmount-2.35.2-29.oe2003sp4.x86_64.rpm util-linux-2.35.2-29.oe2003sp4.x86_64.rpm util-linux-debuginfo-2.35.2-29.oe2003sp4.x86_64.rpm util-linux-debugsource-2.35.2-29.oe2003sp4.x86_64.rpm util-linux-devel-2.35.2-29.oe2003sp4.x86_64.rpm util-linux-user-2.35.2-29.oe2003sp4.x86_64.rpm uuidd-2.35.2-29.oe2003sp4.x86_64.rpm libblkid-2.37.2-52.oe2203sp4.x86_64.rpm libfdisk-2.37.2-52.oe2203sp4.x86_64.rpm libmount-2.37.2-52.oe2203sp4.x86_64.rpm libsmartcols-2.37.2-52.oe2203sp4.x86_64.rpm libuuid-2.37.2-52.oe2203sp4.x86_64.rpm python3-libmount-2.37.2-52.oe2203sp4.x86_64.rpm util-linux-2.37.2-52.oe2203sp4.x86_64.rpm util-linux-debuginfo-2.37.2-52.oe2203sp4.x86_64.rpm util-linux-debugsource-2.37.2-52.oe2203sp4.x86_64.rpm util-linux-devel-2.37.2-52.oe2203sp4.x86_64.rpm util-linux-user-2.37.2-52.oe2203sp4.x86_64.rpm uuidd-2.37.2-52.oe2203sp4.x86_64.rpm libblkid-2.39.1-38.oe2403.x86_64.rpm libfdisk-2.39.1-38.oe2403.x86_64.rpm libmount-2.39.1-38.oe2403.x86_64.rpm libsmartcols-2.39.1-38.oe2403.x86_64.rpm libuuid-2.39.1-38.oe2403.x86_64.rpm python3-libmount-2.39.1-38.oe2403.x86_64.rpm util-linux-2.39.1-38.oe2403.x86_64.rpm util-linux-debuginfo-2.39.1-38.oe2403.x86_64.rpm util-linux-debugsource-2.39.1-38.oe2403.x86_64.rpm util-linux-devel-2.39.1-38.oe2403.x86_64.rpm util-linux-user-2.39.1-38.oe2403.x86_64.rpm uuidd-2.39.1-38.oe2403.x86_64.rpm libblkid-2.39.1-38.oe2403sp1.x86_64.rpm libfdisk-2.39.1-38.oe2403sp1.x86_64.rpm libmount-2.39.1-38.oe2403sp1.x86_64.rpm libsmartcols-2.39.1-38.oe2403sp1.x86_64.rpm libuuid-2.39.1-38.oe2403sp1.x86_64.rpm python3-libmount-2.39.1-38.oe2403sp1.x86_64.rpm util-linux-2.39.1-38.oe2403sp1.x86_64.rpm util-linux-debuginfo-2.39.1-38.oe2403sp1.x86_64.rpm util-linux-debugsource-2.39.1-38.oe2403sp1.x86_64.rpm util-linux-devel-2.39.1-38.oe2403sp1.x86_64.rpm util-linux-user-2.39.1-38.oe2403sp1.x86_64.rpm uuidd-2.39.1-38.oe2403sp1.x86_64.rpm libblkid-2.39.1-38.oe2403sp3.x86_64.rpm libfdisk-2.39.1-38.oe2403sp3.x86_64.rpm libmount-2.39.1-38.oe2403sp3.x86_64.rpm libsmartcols-2.39.1-38.oe2403sp3.x86_64.rpm libuuid-2.39.1-38.oe2403sp3.x86_64.rpm python3-libmount-2.39.1-38.oe2403sp3.x86_64.rpm util-linux-2.39.1-38.oe2403sp3.x86_64.rpm util-linux-debuginfo-2.39.1-38.oe2403sp3.x86_64.rpm util-linux-debugsource-2.39.1-38.oe2403sp3.x86_64.rpm util-linux-devel-2.39.1-38.oe2403sp3.x86_64.rpm util-linux-user-2.39.1-38.oe2403sp3.x86_64.rpm uuidd-2.39.1-38.oe2403sp3.x86_64.rpm util-linux-2.35.2-29.oe2003sp4.src.rpm util-linux-2.37.2-52.oe2203sp4.src.rpm util-linux-2.39.1-38.oe2403.src.rpm util-linux-2.39.1-38.oe2403sp1.src.rpm util-linux-2.39.1-38.oe2403sp3.src.rpm util-linux is a random collection of Linux utilities. Prior to version 2.41.4, a TOCTOU (Time-of-Check-Time-of-Use) vulnerability has been identified in the SUID binary /usr/bin/mount from util-linux. The mount binary, when setting up loop devices, validates the source file path with user privileges via fork() + setuid() + realpath(), but subsequently re-canonicalizes and opens it with root privileges (euid=0) without verifying that the path has not been replaced between both operations. Neither O_NOFOLLOW, nor inode comparison, nor post-open fstat() are employed. This allows a local unprivileged user to replace the source file with a symlink pointing to any root-owned file or device during the race window, causing the SUID binary to open and mount it as root. Exploitation requires an /etc/fstab entry with user,loop options whose path points to a directory where the attacker has write permission, and that /usr/bin/mount has the SUID bit set (the default configuration on virtually all Linux distributions). The impact is unauthorized read access to root-protected files and block devices, including backup images, disk volumes, and any file containing a valid filesystem. This issue has been patched in version 2.41.4. 2026-05-09 CVE-2026-27456 openEuler-20.03-LTS-SP4 openEuler-22.03-LTS-SP4 openEuler-24.03-LTS openEuler-24.03-LTS-SP1 openEuler-24.03-LTS-SP3 Medium 4.7 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N util-linux security update 2026-05-09 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2211