medium6.8

CVE-2026-13595

A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD,...

Impact

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.

Affected products

Vendor	Product	Affected versions
Redhat	Hardened Images	All versions
Redhat	Openshift Container Platform	from 4.0 through 4.22.1
Redhat	Enterprise Linux	Versions 7.0, 8.0, 9.0, 10.0
Kernel	Util-Linux	before 2.42.2
Red Hat	Red Hat Enterprise Linux 10	All versions Version patch: 0:2.40.2-18.el10_2.20
Red Hat	Red Hat Hardened Images	All versions Version patch: 2.42.2-1.hum1
Red Hat	Red Hat Enterprise Linux 7	All versions
Red Hat	Red Hat Enterprise Linux 8	All versions
Red Hat	Red Hat Enterprise Linux 9	All versions
Red Hat	Red Hat OpenShift Container Platform 4	All versions
Red Hat	Red Hat OpenShift Container Platform 5	All versions

Weakness classification

CWE-416

Impact

Affected products

Weakness classification

References