CVE-2026-23269
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
apparmor: validate DFA start states are in bounds in unpack_pdb
Start states are read from untrusted data and used as indexes into the
DFA state tables. The aa_dfa_next() function call in unpack_pdb() will
access dfa->tables[YYTD_ID_BASE][start], and if the start state exceeds
the number of states in the DFA, this results in an out-of-bound read.
==================================================================
BUG: KASAN: slab-out-of-bounds in aa_dfa_next+0x2a1/0x360
Read of size 4 at addr ffff88811956fb90 by task su/1097
...
Reject policies with out-of-bounds start states during unpacking
to prevent the issue.
https://git.kernel.org/stable/c/0baadb0eece2c4d939db10d3c323b4652ac79a58
https://git.kernel.org/stable/c/15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c
https://git.kernel.org/stable/c/3bb7db43e32190c973d4019037cedb7895920184
https://git.kernel.org/stable/c/9063d7e2615f4a7ab321de6b520e23d370e58816