CVE-2026-72451
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
In the Linux kernel's xfrm module, there is a race during state cache insertion. The state validity check occurs before acquiring the global xfrm_state_lock, allowing a dead state to be inserted into the cache.
Risk Assessment
Inserting a dead state can lead to incorrect IPsec packet processing, potentially enabling attacks or crashes.
Recommendation
Apply the Linux kernel fix that moves the state validity check inside the lock.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix xfrm state cache insertion race The xfrm input state cache insertion code checks the validity of the state before acquiring the global xfrm_state_lock. Thus it's possible for someone else to kill the state after it passed the validity check, and then the insertion will add the dead state to the cache. Fix this by moving the validity check inside the lock. This entire function is called on the input path, where BH must be off (e.g., the caller of this function xfrm_input acquires its spinlocks without disabling BH). So there is no need to disable BH here or take the RCU read lock. Remove both and replace them with an assertion that trips if BH is accidentally enabled on some future calling path.