CVE-2025-21904

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

Description A vulnerability in the Linux kernel has been resolved, specifically in the caif virtio module. The issue was related to a wrong pointer check in the cfv probe() function. The del vqs() function frees virtqueues, and therefore, the cfv->vq tx pointer should be checked for NULL before calling it, not cfv->vdev. The current implementation was redundant because the pointer cfv->vdev is dereferenced before it is checked for NULL. This has been fixed by checking cfv->vq tx for NULL instead of cfv->vdev before calling del vqs().

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