CVE-2026-74646

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

Description A race condition exists in the fastrpc component of the Linux kernel. When an invoke operation is interrupted by a signal, the wait for completion interruptible() function returns -ERESTARTSYS, and fastrpc internal invoke() moves buffers from fl->mmaps to cctx->invoke interrupted mmaps. This process, involving list del() and list add tail(), occurs without holding the fl->lock, which is the lock used to serialize fl->mmaps in other functions such as fastrpc req mmap() and fastrpc req munmap().

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