{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47670","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T07:16:05.752Z","datePublished":"2025-04-17T18:01:30.722Z","dateUpdated":"2026-05-11T13:58:55.028Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T13:58:55.028Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: peak_usb: fix use after free bugs\n\nAfter calling peak_usb_netif_rx_ni(skb), dereferencing skb is unsafe.\nEspecially, the can_frame cf which aliases skb memory is accessed\nafter the peak_usb_netif_rx_ni().\n\nReordering the lines solves the issue."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/peak_usb/pcan_usb_fd.c"],"versions":[{"version":"0a25e1f4f18566b750ebd3ae995af64e23111e63","lessThan":"5408824636fa0dfedb9ecb0d94abd573131bfbbe","status":"affected","versionType":"git"},{"version":"0a25e1f4f18566b750ebd3ae995af64e23111e63","lessThan":"ddd1416f44130377798c1430b76503513b7497c2","status":"affected","versionType":"git"},{"version":"0a25e1f4f18566b750ebd3ae995af64e23111e63","lessThan":"ec939c13c3fff2114479769c8380b7f1a54feca9","status":"affected","versionType":"git"},{"version":"0a25e1f4f18566b750ebd3ae995af64e23111e63","lessThan":"50aca891d7a554db0901b245167cd653d73aaa71","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/usb/peak_usb/pcan_usb_fd.c"],"versions":[{"version":"4.0","status":"affected"},{"version":"0","lessThan":"4.0","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":"4.0","versionEndExcluding":"4.19.171"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"5.4.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"5.10.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"5.11"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe"},{"url":"https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2"},{"url":"https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9"},{"url":"https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71"}],"title":"can: peak_usb: fix use after free bugs","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-2021-47670","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-04-17T18:17:46.529671Z"}}}],"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":"2025-04-17T18:25:25.160Z"}}]}}