{"id":"CVE-2026-53615","title":"util-linux is a random collection of Linux utilities","summary":"util-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-ar…","severity":"high","cvss":8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","cwe":["CWE-190"],"published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T16:17:46.070","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53615","references":[{"url":"https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/releases/tag/v2.41.4","label":"security-advisories@github.com"},{"url":"https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5","label":"security-advisories@github.com"}],"tags":["nvd"],"ingestedAt":"2026-10-14T16:40:32.125Z","slug":"CVE-2026-53615","body":"## Overview\n\nutil-linux is a random collection of Linux utilities. Before util-linux 2.41.4, `parse_dos_extended()` in `libblkid/src/partitions/dos.c` computes an extended-partition start sector with 32-bit addition and does not apply the extended-area bounds checks to the first two EBR entries. A local attacker who causes a crafted DOS extended-partition disk image or removable medium to be probed can wrap `cur_start + start` to sector zero and cause libblkid to report a false partition overlapping the MBR. This directly compromises the integrity of the reported partition metadata; disk modification or availability loss requires a separate downstream consumer to act on that metadata. This issue is fixed in 2.41.4.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":44,"depthScoreParts":{"impact":44,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}