CVE-2025-21904 Information

Description

In the Linux kernel the following vulnerability has been resolved:

caif_virtio: fix wrong pointer check in cfv_probe()

del_vqs() frees virtqueues therefore cfv->vq_tx pointer should be checked for NULL before calling it not cfv->vdev. Also the current implementation is redundant because the pointer cfv->vdev is dereferenced before it is checked for NULL.

Fix this by checking cfv->vq_tx for NULL instead of cfv->vdev before calling del_vqs().

Reference

https://git.kernel.org/stable/c/29e0cd296c87240278e2f7ea4cf3f496b60c03af https://git.kernel.org/stable/c/56cddf71cce3b15b078e937fadab29962b6f6643 https://git.kernel.org/stable/c/597c27e5f04cb50e56cc9aeda75d3e42b6b89c3e https://git.kernel.org/stable/c/7b5fe58959822e6cfa884327cabba6be3b01883d https://git.kernel.org/stable/c/8e4e08ca4cc634b337bb74bc9a70758fdeda0bcb https://git.kernel.org/stable/c/90d302619ee7ce5ed0c69c29c290bdccfde66418 https://git.kernel.org/stable/c/990fff6980d0c1693d60a812f58dbf93eab0473f https://git.kernel.org/stable/c/a466fd7e9fafd975949e5945e2f70c33a94b1a70