🛡️ CVE-2026-13595 — enterprise-linux

🟡 CVSS 6.8 — Medium ✅ No Known Exploit CWE-416 NVD
6.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition additions cause the array to be reallocated, this pointer becomes stale, leading to a heap use-after-free read. An attacker who can present a crafted block device image (for example, via USB insertion or a loop-mounted disk image) can trigger this flaw without user interaction, as libblkid is invoked automatically by udev/udisks as root on block-device hot-plug events. This could lead to limited information disclosure or denial of service.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability high.

Weakness class

CVE-2026-13595 is classified as CWE-416: Use After Free. Memory is used after being released, so its contents may already belong to something else.

Affected software

CVE-2026-13595 is recorded against 4 packages.

  • enterprise-linux
  • hardened-images
  • openshift-container-platform (from 4.0 up to 4.22.1)
  • util-linux (fixed in 2.42.2)

Timeline and source

Published on 29 June 2026 and last revised on 8 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

access.redhat.com
access.redhat.com
bugzilla.redhat.com
github.com

Details

Severity MEDIUM
CVSS Score 6.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CWE CWE-416
Public Exploit ✅ No
Source NVD
Published 2026-06-29
Updated 2026-08-11
Modified 2026-07-08

Affected Packages

Software From version Fixed in
enterprise-linux
hardened-images
openshift-container-platform 4.0 4.22.1
util-linux 2.42.2

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