CVE-2026-13595
Published: July 1, 2026Last modified: July 9, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack Vector | LOCAL |
| Attack complexity | HIGH |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | LOW |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H |
Notes
https://github.com/util-linux/util-linux/commit/60ca8616ac1a223bfb5a713047a37136dd9481ef (v2.42.2) https://github.com/util-linux/util-linux/commit/132d9c8aa15a8efd0a23d8ca7ed8b98f365e84fa (v2.41.5)
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | util-linux | Fixed (2.38.1-r7) |
| 25 LTS | util-linux | Fixed (2.41-r9) | |
| Stream | util-linux | Fixed (2.42.2-r0) | |
| Hardened Containers | 23 LTS | util-linux | Fixed (2.38.1-r7) |
| 25 LTS | util-linux | Fixed (2.41-r9) | |
| Stream | util-linux | Fixed (2.42.2-r0) |