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CVE-2026-13595

Util-linux: util-linux: heap use-after-free in libblkid nested partition probing

Published: Jun 29, 2026Updated: Jul 8, 2026 Sources: CVE List NVDCWE-416
6.8MEDIUM
NVD MITRE
EPSS Score
0.1%
Top 98.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:NS:UC:LI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-416

Affected Products

Red Hat
commercial·USaka redhat
hardened imagesOn-prem
Operating Systems / linux-distro
openshift container platformOn-prem
Operating Systems / linux-distro
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat Hardened ImagesOn-premOS
Operating Systems / linux-distro
Red Hat OpenShift Container Platform 4SaaSSaaS Service
Cloud & SaaS / container-orchestration
kernel
oss-project
util-linuxMixed
Operating Systems / linux-distro
and 4 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://access.redhat.com/errata/RHSA-2026:26573
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-13595
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2494101
bugzilla.redhat.com
and 1 more references View all →

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