PT-2026-80505 · Julia · Libmount Jll+1
Published
2026-08-12
·
Updated
2026-08-12
CVSS v3.1
5.3
Medium
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H |
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.
Fix
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Related Identifiers
Affected Products
Libmount Jll
Util Linux Jll