CVE-2024-26583
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
In the Linux kernel, there is a race condition in the TLS implementation between async notify and socket close. The submitting thread may exit as soon as the async crypto handler calls complete(), risking access to already freed data.
Risk Assessment
The vulnerability can lead to use-after-free, potentially causing system crashes or privilege escalation.
Recommendation
Apply a Linux kernel update containing the fix that adds extra references and relies on atomic ref counter for synchronization.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: tls: fix race between async notify and socket close The submitting thread (one which called recvmsg/sendmsg) may exit as soon as the async crypto handler calls complete() so any code past that point risks touching already freed data. Try to avoid the locking and extra flags altogether. Have the main thread hold an extra reference, this way we can depend solely on the atomic ref counter for synchronization. Don't futz with reiniting the completion, either, we are now tightly controlling when completion fires.