CVE-2026-13595
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 to fix
- kernel util-linux2.42.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kernel util-linux | v < 2.42.2 | 2.42.2 |
| redhat hardened_images | No range specified | — |
| redhat openshift_container_platform | 4.0 ≤ v ≤ 4.22.1 | — |
| redhat enterprise_linux | 7.0, 8.0, 9.0, 10.0 | — |
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