| From bippy-7c5fe7eed585 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-21904: caif_virtio: fix wrong pointer check in cfv_probe() |
| |
| 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(). |
| |
| The Linux kernel CVE team has assigned CVE-2025-21904 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.10 with commit 0d2e1a2926b1839a4b74519e660739b2566c9386 and fixed in 5.4.291 with commit 990fff6980d0c1693d60a812f58dbf93eab0473f |
| Issue introduced in 3.10 with commit 0d2e1a2926b1839a4b74519e660739b2566c9386 and fixed in 5.10.235 with commit 7b5fe58959822e6cfa884327cabba6be3b01883d |
| Issue introduced in 3.10 with commit 0d2e1a2926b1839a4b74519e660739b2566c9386 and fixed in 5.15.179 with commit 8e4e08ca4cc634b337bb74bc9a70758fdeda0bcb |
| Issue introduced in 3.10 with commit 0d2e1a2926b1839a4b74519e660739b2566c9386 and fixed in 6.1.131 with commit 29e0cd296c87240278e2f7ea4cf3f496b60c03af |
| Issue introduced in 3.10 with commit 0d2e1a2926b1839a4b74519e660739b2566c9386 and fixed in 6.6.83 with commit 90d302619ee7ce5ed0c69c29c290bdccfde66418 |
| Issue introduced in 3.10 with commit 0d2e1a2926b1839a4b74519e660739b2566c9386 and fixed in 6.12.19 with commit 56cddf71cce3b15b078e937fadab29962b6f6643 |
| Issue introduced in 3.10 with commit 0d2e1a2926b1839a4b74519e660739b2566c9386 and fixed in 6.13.7 with commit 597c27e5f04cb50e56cc9aeda75d3e42b6b89c3e |
| Issue introduced in 3.10 with commit 0d2e1a2926b1839a4b74519e660739b2566c9386 and fixed in 6.14 with commit a466fd7e9fafd975949e5945e2f70c33a94b1a70 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-21904 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/net/caif/caif_virtio.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/990fff6980d0c1693d60a812f58dbf93eab0473f |
| https://git.kernel.org/stable/c/7b5fe58959822e6cfa884327cabba6be3b01883d |
| https://git.kernel.org/stable/c/8e4e08ca4cc634b337bb74bc9a70758fdeda0bcb |
| https://git.kernel.org/stable/c/29e0cd296c87240278e2f7ea4cf3f496b60c03af |
| https://git.kernel.org/stable/c/90d302619ee7ce5ed0c69c29c290bdccfde66418 |
| https://git.kernel.org/stable/c/56cddf71cce3b15b078e937fadab29962b6f6643 |
| https://git.kernel.org/stable/c/597c27e5f04cb50e56cc9aeda75d3e42b6b89c3e |
| https://git.kernel.org/stable/c/a466fd7e9fafd975949e5945e2f70c33a94b1a70 |
