PT-2026-29489 · Linux+2 · Linux Kernel+2
Published
2026-04-01
·
Updated
2026-05-07
·
CVE-2026-23406
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.19.0-rc7-next-20260127
Description
The Linux kernel contains a flaw within the apparmor subsystem, specifically in the
match char() macro. This macro incorrectly evaluates its character parameter multiple times during differential encoding chain traversal. When used with str++, the string pointer increments with each inner loop iteration, causing the Deterministic Finite Automaton (DFA) to check different characters and potentially skip input. This can lead to out-of-bounds reads when the pointer goes beyond the input buffer's boundaries. The issue manifests as a slab-out-of-bounds error, as indicated by KASAN.Recommendations
Update to kernel version 6.19.0-rc7-next-20260127 or later.
Fix
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Linuxmint
Linux Kernel
Ubuntu