{"id":"CVE-2025-21904","state":"PUBLISHED","title":"caif_virtio: fix wrong pointer check in cfv_probe()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncaif_virtio: fix wrong pointer check in cfv_probe()\n\ndel_vqs() frees virtqueues, therefore cfv->vq_tx pointer should be checked\nfor NULL before calling it, not cfv->vdev. Also the current implementation\nis redundant because the pointer cfv->vdev is dereferenced before it is\nchecked for NULL.\n\nFix this by checking cfv->vq_tx for NULL instead of cfv->vdev before\ncalling del_vqs().","publishedAt":"2025-04-01T15:40:45.881Z","updatedAt":"2026-05-11T21:08:46.568Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"990fff6980d0c1693d60a812f58dbf93eab0473f","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"7b5fe58959822e6cfa884327cabba6be3b01883d","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"8e4e08ca4cc634b337bb74bc9a70758fdeda0bcb","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"29e0cd296c87240278e2f7ea4cf3f496b60c03af","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"90d302619ee7ce5ed0c69c29c290bdccfde66418","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"56cddf71cce3b15b078e937fadab29962b6f6643","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"597c27e5f04cb50e56cc9aeda75d3e42b6b89c3e","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"a466fd7e9fafd975949e5945e2f70c33a94b1a70","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/caif/caif_virtio.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"5.4.291","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.235","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.179","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.131","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.83","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.19","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.7","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/caif/caif_virtio.c"]}],"references":["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","https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html","https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/21xxx/CVE-2025-21904.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-21904","state":"PUBLISHED","datePublished":"2025-04-01T15:40:45.881Z","dateUpdated":"2026-05-11T21:08:46.568Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-12-29T08:45:45.785Z"},"containers":{"cna":{"title":"caif_virtio: fix wrong pointer check in cfv_probe()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncaif_virtio: fix wrong pointer check in cfv_probe()\n\ndel_vqs() frees virtqueues, therefore cfv->vq_tx pointer should be checked\nfor NULL before calling it, not cfv->vdev. Also the current implementation\nis redundant because the pointer cfv->vdev is dereferenced before it is\nchecked for NULL.\n\nFix this by checking cfv->vq_tx for NULL instead of cfv->vdev before\ncalling del_vqs()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"990fff6980d0c1693d60a812f58dbf93eab0473f","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"7b5fe58959822e6cfa884327cabba6be3b01883d","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"8e4e08ca4cc634b337bb74bc9a70758fdeda0bcb","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"29e0cd296c87240278e2f7ea4cf3f496b60c03af","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"90d302619ee7ce5ed0c69c29c290bdccfde66418","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"56cddf71cce3b15b078e937fadab29962b6f6643","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"597c27e5f04cb50e56cc9aeda75d3e42b6b89c3e","versionType":"git"},{"version":"0d2e1a2926b1839a4b74519e660739b2566c9386","status":"affected","lessThan":"a466fd7e9fafd975949e5945e2f70c33a94b1a70","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/caif/caif_virtio.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"5.4.291","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.235","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.179","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.131","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.83","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.19","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.7","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/caif/caif_virtio.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/990fff6980d0c1693d60a812f58dbf93eab0473f"},{"url":"https://git.kernel.org/stable/c/7b5fe58959822e6cfa884327cabba6be3b01883d"},{"url":"https://git.kernel.org/stable/c/8e4e08ca4cc634b337bb74bc9a70758fdeda0bcb"},{"url":"https://git.kernel.org/stable/c/29e0cd296c87240278e2f7ea4cf3f496b60c03af"},{"url":"https://git.kernel.org/stable/c/90d302619ee7ce5ed0c69c29c290bdccfde66418"},{"url":"https://git.kernel.org/stable/c/56cddf71cce3b15b078e937fadab29962b6f6643"},{"url":"https://git.kernel.org/stable/c/597c27e5f04cb50e56cc9aeda75d3e42b6b89c3e"},{"url":"https://git.kernel.org/stable/c/a466fd7e9fafd975949e5945e2f70c33a94b1a70"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:08:46.568Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.4.291"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.10.235"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.15.179"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.1.131"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.6.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.12.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.13.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"6.14"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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