CVE-2025-38440

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

Description A race condition exists between disabling Direct Interrupt Management (DIM) and Network Interrupt callbacks using the DIM pointer on the Receive Queue (RQ) or Send Queue (SQ). If NAPI checks the DIM state bit and it is still set, it assumes rq->dim or sq->dim is valid. However, if DIM is disabled immediately after this check, the pointer may already be set to NULL, leading to a NULL pointer dereference in the net dim() function. This can result in a kernel panic.

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