Medium severity5.5NVD Advisory· Published Apr 1, 2025· Updated Jun 17, 2026
CVE-2025-21904
CVE-2025-21904
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().
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
87(expand)+ 7 more
- (no CPE)
- (no CPE)range: 3.10
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=3.10,<5.4.291
- cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*
- osv-coords79 versionspkg:rpm/suse/kernel-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-syms-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP7pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP6pkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-debug&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/kernel-livepatch-SLE15-SP6-RT_Update_11&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/opensuse/kernel-syms-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP6pkg:rpm/suse/kernel-coco_debug&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP7pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-livepatch-SLE15-SP7_Update_1&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP7pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP7pkg:rpm/suse/kernel-livepatch-MICRO-6-0-RT_Update_8&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-livepatch-MICRO-6-0_Update_7&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-livepatch-MICRO-6-0_Update_7&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-livepatch-MICRO-6-0-RT_Update_8&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.1pkg:linux/kernelpkg:rpm/suse/kernel-source-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-livepatch-SLE15-SP6_Update_11&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-rt_debug&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/opensuse/kernel-source-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6
< 6.4.0-15061.21.coco15sp6.1+ 78 more
- (no CPE)range: < 6.4.0-15061.21.coco15sp6.1
- (no CPE)range: < 6.4.0-15061.21.coco15sp6.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1.150600.12.22.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 1-150600.1.3.2
- (no CPE)range: < 6.4.0-150600.10.39.1
- (no CPE)range: < 6.4.0-150600.10.39.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-15061.21.coco15sp6.1
- (no CPE)range: < 6.4.0-150700.20.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1.150700.17.2.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 1-150700.15.3.1
- (no CPE)range: < 6.4.0-150700.53.3.1
- (no CPE)range: < 6.4.0-150700.20.3.1
- (no CPE)range: < 1-1.2
- (no CPE)range: < 6.4.0-31.1
- (no CPE)range: < 6.4.0-31.1
- (no CPE)range: < 6.4.0-29.1
- (no CPE)range: < 6.4.0-29.1.21.7
- (no CPE)range: < 6.4.0-29.1
- (no CPE)range: < 1-1.2
- (no CPE)range: < 6.4.0-29.1
- (no CPE)range: < 6.4.0-29.1
- (no CPE)range: < 6.4.0-29.1.21.7
- (no CPE)range: < 6.4.0-29.1
- (no CPE)range: < 1-1.2
- (no CPE)range: < 6.4.0-29.1
- (no CPE)range: < 1-1.2
- (no CPE)range: < 6.4.0-31.1
- (no CPE)range: < 6.4.0-31.1
- (no CPE)range: >= 3.10.0, < 5.4.291
- (no CPE)range: < 6.4.0-15061.21.coco15sp6.1
- (no CPE)range: < 6.4.0-150700.20.3.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1.150600.12.22.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 1-150600.13.3.1
- (no CPE)range: < 6.4.0-150600.23.50.1
- (no CPE)range: < 6.4.0-150600.8.37.1
- (no CPE)range: < 6.4.0-150600.8.37.1
- (no CPE)range: < 6.4.0-150600.8.37.1
- (no CPE)range: < 6.4.0-150600.8.37.1
- (no CPE)range: < 6.4.0-150600.10.39.1
- (no CPE)range: < 6.4.0-150600.10.39.1
- (no CPE)range: < 6.4.0-150600.10.39.1
- (no CPE)range: < 6.4.0-150600.10.39.1
- (no CPE)range: < 6.4.0-150600.10.39.1
- (no CPE)range: < 6.4.0-150600.8.37.1
- (no CPE)range: < 6.4.0-150600.8.37.1
- (no CPE)range: < 6.4.0-150600.10.39.1
Patches
Vulnerability mechanics
References
10- git.kernel.org/stable/c/29e0cd296c87240278e2f7ea4cf3f496b60c03afnvdPatch
- git.kernel.org/stable/c/56cddf71cce3b15b078e937fadab29962b6f6643nvdPatch
- git.kernel.org/stable/c/597c27e5f04cb50e56cc9aeda75d3e42b6b89c3envdPatch
- git.kernel.org/stable/c/7b5fe58959822e6cfa884327cabba6be3b01883dnvdPatch
- git.kernel.org/stable/c/8e4e08ca4cc634b337bb74bc9a70758fdeda0bcbnvdPatch
- git.kernel.org/stable/c/90d302619ee7ce5ed0c69c29c290bdccfde66418nvdPatch
- git.kernel.org/stable/c/990fff6980d0c1693d60a812f58dbf93eab0473fnvdPatch
- git.kernel.org/stable/c/a466fd7e9fafd975949e5945e2f70c33a94b1a70nvdPatch
- lists.debian.org/debian-lts-announce/2025/05/msg00030.htmlnvd
- lists.debian.org/debian-lts-announce/2025/05/msg00045.htmlnvd
News mentions
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