CVE-2026-23404
Description
In the Linux kernel, the following vulnerability has been resolved:
apparmor: replace recursive profile removal with iterative approach
The profile removal code uses recursion when removing nested profiles, which can lead to kernel stack exhaustion and system crashes.
Reproducer: $ pf='a'; for ((i=0; i<1024; i++)); do echo -e "profile $pf { \n }" | apparmor_parser -K -a; pf="$pf//x"; done $ echo -n a > /sys/kernel/security/apparmor/.remove
Replace the recursive __aa_profile_list_release() approach with an iterative approach in __remove_profile(). The function repeatedly finds and removes leaf profiles until the entire subtree is removed, maintaining the same removal semantic without recursion.
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Affected products
10cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=2.6.36.1,<5.10.253
- cpe:2.3:o:linux:linux_kernel:2.6.36:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
- (no CPE)
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/33959a491e9fd557abfa5fce5ae4637d400915d3nvdPatch
- git.kernel.org/stable/c/4fdc847b107321dec22bf8ecd6019b7af76d7886nvdPatch
- git.kernel.org/stable/c/7eade846e013cbe8d2dc4a484463aa19e6515c7fnvdPatch
- git.kernel.org/stable/c/999bd704b0b641527a5ed46f0d969deff8cfa68bnvdPatch
- git.kernel.org/stable/c/a6a941a1294ac5abe22053dc501d25aed96e48fenvdPatch
- git.kernel.org/stable/c/ab09264660f9de5d05d1ef4e225aa447c63a8747nvdPatch
- git.kernel.org/stable/c/b36a04284d0208be94e5e401409caa00e2bf1be1nvdPatch
- git.kernel.org/stable/c/ea854f032190cc9f26dc4a0e727090c89e55e342nvdPatch
News mentions
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