{"id":"CVE-2026-53613","title":"util-linux is a random collection of Linux utilities","summary":"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 `/et…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-367"],"published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T15:17:20.410","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53613","references":[{"url":"https://github.com/util-linux/util-linux/commit/0b010025a0e429bc80355c94db86a843395d49e2","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/0d3d55975aa3492c62fd345eac38f41cd166c0b0","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/2c773f336134acf016e639abb6f12ba7341fe4b8","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/39fef62bf3226abb6bb018fa8750afa0327e84b4","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/472cc3fb2d4d47cca7aab2e0b59eb3fb8a9359ec","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/646fb66603d10a7ac337e14f566f1af48e3107c9","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/708d1b3c51932dc5ba8082c7368187715e6a8d78","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/78a860982e036f38fe9c0b3344998df5ac2c2ff5","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/85d16b341f7232c9dbb4884b632e1e956584bee9","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/a9508d216eb8977979102782672e0470cc9bf2a2","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/releases/tag/v2.41.5","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/releases/tag/v2.42.2","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/releases/tag/v2.42.4","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/security/advisories/GHSA-8gj5-72r3-428g","label":"security-advisories@github.com"}],"tags":["nvd","exploit-available"],"exploits":{"github":1,"githubRepos":["https://github.com/mohamedjawady/CVE-2026-53613-poc"],"checkedAt":"2026-10-14T15:36:48.442Z"},"exploitAvailable":true,"ingestedAt":"2026-10-14T15:36:14.020Z","slug":"CVE-2026-53613","body":"## Overview\n\nutil-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 the mount operation re-resolves that pathname. A local low-privileged user authorized by an fstab `user` or `users` entry whose target has an attacker-writable ancestor can use `renameat2(RENAME_EXCHANGE)` to swap a path component and redirect an authorized mount to a root-owned location, such as mounting attacker-controlled content over `/etc/sudoers.d`, and thereby gain root privileges. Versions 2.41.5 and 2.42.2 pin targets for the new mount API, and 2.42.4 pins legacy targets through `/proc/self/fd`; the documented legacy fallback without `/proc` remains affected.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}