CVE-2026-53615

Publication date 18 June 2026

Last updated 28 October 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.0 · High

Score breakdown

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.

Status

Package Ubuntu Release Status
util-linux 26.10 stonking
Vulnerable work in progress in 2.42.2-1ubuntu1
26.04 LTS resolute
Fixed in 2.41.3-3ubuntu2.2
25.10 questing Ignored end of life, was needs-triage
24.04 LTS noble
Fixed in 2.39.3-9ubuntu6.6
22.04 LTS jammy
Fixed in 2.37.2-4ubuntu3.6
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
util-linux

Severity score breakdown

CVSS version: CVSS v3.0

Base score 8.0 · High

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-8702-1
    • util-linux vulnerabilities
    • 31 August 2026

Other references

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