CVE-2025-21904

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().

The following products are affected by CVE-2025-21904 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-21904.

URL	Resource
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
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
https://lore.kernel.org/linux-cve-announce/2025040129-CVE-2025-21904-cd79@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2025-21904
https://www.cve.org/CVERecord?id=CVE-2025-21904