{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47669","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:16:05.752Z","datePublished":"2025-04-17T18:01:29.979Z","dateUpdated":"2026-05-11T13:58:50.554Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T13:58:50.554Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: vxcan: vxcan_xmit: fix use after free bug\n\nAfter calling netif_rx_ni(skb), dereferencing skb is unsafe.\nEspecially, the canfd_frame cfd which aliases skb memory is accessed\nafter the netif_rx_ni()."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/vxcan.c"],"versions":[{"version":"a8f820a380a2a06fc4fe1a54159067958f800929","lessThan":"6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105","status":"affected","versionType":"git"},{"version":"a8f820a380a2a06fc4fe1a54159067958f800929","lessThan":"9b820875a32a3443d67bfd368e93038354e98052","status":"affected","versionType":"git"},{"version":"a8f820a380a2a06fc4fe1a54159067958f800929","lessThan":"a24476b37167816e6352ca1a2cf3769847774f70","status":"affected","versionType":"git"},{"version":"a8f820a380a2a06fc4fe1a54159067958f800929","lessThan":"e771a874076115df8bff27d325edfd2340e4ec69","status":"affected","versionType":"git"},{"version":"a8f820a380a2a06fc4fe1a54159067958f800929","lessThan":"75854cad5d80976f6ea0f0431f8cedd3bcc475cb","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/vxcan.c"],"versions":[{"version":"4.12","status":"affected"},{"version":"0","lessThan":"4.12","status":"unaffected","versionType":"semver"},{"version":"4.14.218","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.171","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.93","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.11","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.11","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.14.218"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"4.19.171"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.4.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.10.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.11"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105"},{"url":"https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052"},{"url":"https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70"},{"url":"https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69"},{"url":"https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb"}],"title":"can: vxcan: vxcan_xmit: fix use after free bug","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2021-47669","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-04-17T18:17:52.149604Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-416","description":"CWE-416 Use After Free"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-04-17T18:25:25.277Z"}}]}}