CVE-2026-53612

{"id": "CVE-2026-53612", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53612", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-14T18:24:31.298549Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.0, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.0}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "util-linux", "product": "util-linux", "versions": [{"status": "affected", "version": ">= 2.39, < 2.41.5"}, {"status": "affected", "version": ">= 2.42, < 2.42.2"}]}]}], "published": "2026-10-14T15:17:20.260", "references": [{"url": "https://github.com/util-linux/util-linux/commit/24da33905c7115c4cbccd0afb2a469804e96467a", "source": "security-advisories@github.com"}, {"url": "https://github.com/util-linux/util-linux/commit/722c96974dd4009a334e4aee556eedaab5fb94b4", "source": "security-advisories@github.com"}, {"url": "https://github.com/util-linux/util-linux/commit/897a08c2b11dfa66975c3d24d63c7bf5f5be1a7c", "source": "security-advisories@github.com"}, {"url": "https://github.com/util-linux/util-linux/commit/d0c5adaeb3a3d823aba1377794de8f009b8152cc", "source": "security-advisories@github.com"}, {"url": "https://github.com/util-linux/util-linux/releases/tag/v2.41.5", "source": "security-advisories@github.com"}, {"url": "https://github.com/util-linux/util-linux/releases/tag/v2.42.2", "source": "security-advisories@github.com"}, {"url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-g8wm-75wr-g2vh", "source": "security-advisories@github.com"}, {"url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-g8wm-75wr-g2vh", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-367"}]}], "descriptions": [{"lang": "en", "value": "util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID `mount` utility's `hook_owner.c` post-mount hook performs path-based `chmod()` and `lchown()` operations on a previously validated mount target. A local low-privileged user authorized by an `/etc/fstab` entry with `user` or `users` and an `X-mount.mode`, `X-mount.owner`, or `X-mount.group` option can use `renameat2(RENAME_EXCHANGE)` to race a writable ancestor of the target and redirect the privileged ownership or mode change to a root-owned path, potentially gaining root privileges. This issue is fixed in 2.41.5 and 2.42.2."}], "lastModified": "2026-10-16T16:00:33.533", "sourceIdentifier": "security-advisories@github.com"}