CVE-2026-23269
apparmor: validate DFA start states are in bounds in unpack_pdb
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.4
References 9
git.kernel.org
- stable/c/f43eea8ae0102ea198da211ef7f5ce83725ecf19
- stable/c/5487871b2b56c19d26936ed6fdc62652b30941df
- stable/c/5443c027ec16afa55b1b8a3e7a1ab2ea3c77767a
- stable/c/07cf6320f40ea2ccfad63728cff34ecb309d03da
- stable/c/15c3eb8916e7db01cb246d04a1fe6f0fdc065b0c
- stable/c/0baadb0eece2c4d939db10d3c323b4652ac79a58
- stable/c/3bb7db43e32190c973d4019037cedb7895920184
- stable/c/9063d7e2615f4a7ab321de6b520e23d370e58816