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CVE-2026-53615 Details

Description

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-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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/util-linux/util-linux/commit/05c2dbadf34cc74192287f377904afaaf4061623	[email protected]
https://github.com/util-linux/util-linux/commit/a2d858176b609ab5b8535021a3af9cd302d23d31	[email protected]
https://github.com/util-linux/util-linux/commit/e9d544d013267ea86b70ee8ff78abd280e6641af	[email protected]
https://github.com/util-linux/util-linux/releases/tag/v2.41.4	[email protected]
https://github.com/util-linux/util-linux/security/advisories/GHSA-h4rw-gv36-wmp5	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-190	Integer Overflow or Wraparound	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 15, 2026	CVE Modified	CISA-ADP
Oct 14, 2026	New CVE Received	[email protected]