Tracker / CVE-2026-23404
CVE-2026-23404
Medium 5.5
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.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 2.6.36.1 → 5.10.253 |
| linux | linux_kernel · 5.11 → 5.15.203 |
| linux | linux_kernel · 5.16 → 6.1.169 |
| linux | linux_kernel · 6.13 → 6.18.18 |
| linux | linux_kernel · 6.19 → 6.19.8 |
| linux | linux_kernel · 6.2 → 6.6.130 |
| linux | linux_kernel · 6.7 → 6.12.77 |
Analysis
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