CVE-2026-72461
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk4th percentile - higher than 4% of all known CVEs
Summary
In the Linux kernel's AppArmor module, a refcount leak exists when updating sk_ctx. update_sk_ctx() transfers the plabel reference, but the caller unconditionally puts it, leading to a refcount imbalance.
Risk Assessment
The refcount leak can lead to resource exhaustion and system instability.
Recommendation
Apply a Linux kernel update containing the fix that gets an additional reference to balance the unconditional put in the caller.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: apparmor: fix refcount leak when updating the sk_ctx Currently update_sk_ctx() transfers the plabel reference, unfortunately it is also unconditionally put in the caller. Ideally we would make the caller conditionally put the reference based on whether it was transferred but for now just fix the bug by getting a reference.