Integer Overflow or Wraparound Affecting util-linux package, versions <2.37.2-4ubuntu3.6


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.18% (7th percentile)

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  • Snyk IDSNYK-UBUNTU2204-UTILLINUX-17369109
  • published1 Sept 2026
  • disclosed14 Oct 2026

Introduced: 1 Sep 2026

CVE-2026-53615  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.04 util-linux to version 2.37.2-4ubuntu3.6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream util-linux package and not the util-linux package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1