CVE-2025-40042

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains a race condition in kprobe initialization that can lead to a NULL pointer dereference and kernel crash. This occurs between kprobe activation and perf events initialization. Specifically, a race condition exists where one CPU core may enable kprobe functionality before another core initializes the perf events list, leading to a crash when the second core attempts to access a NULL pointer. The crash occurs within the kprobe perf func function when attempting to read from an uninitialized perf events structure. The issue is related to the trace kprobe.c file and the kprobe perf func function.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.