{"id":"CVE-2021-47211","state":"PUBLISHED","title":"ALSA: usb-audio: fix null pointer dereference on pointer cs_desc","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: fix null pointer dereference on pointer cs_desc\n\nThe pointer cs_desc return from snd_usb_find_clock_source could\nbe null, so there is a potential null pointer dereference issue.\nFix this by adding a null check before dereference.","publishedAt":"2024-04-10T19:01:52.636Z","updatedAt":"2026-06-19T11:57:06.060Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1dc669fed61a4ec4270a89e5fb3535802cc45668","status":"affected","lessThan":"3455984b16eeb6914caf8b59498ef24fcc1f0a78","versionType":"git"},{"version":"1dc669fed61a4ec4270a89e5fb3535802cc45668","status":"affected","lessThan":"58fa50de595f152900594c28ec9915c169643739","versionType":"git"},{"version":"1dc669fed61a4ec4270a89e5fb3535802cc45668","status":"affected","lessThan":"b97053df0f04747c3c1e021ecbe99db675342954","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/clock.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.5","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/clock.c"]}],"references":["https://git.kernel.org/stable/c/3455984b16eeb6914caf8b59498ef24fcc1f0a78","https://git.kernel.org/stable/c/58fa50de595f152900594c28ec9915c169643739","https://git.kernel.org/stable/c/b97053df0f04747c3c1e021ecbe99db675342954"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47211.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47211","state":"PUBLISHED","datePublished":"2024-04-10T19:01:52.636Z","dateUpdated":"2026-06-19T11:57:06.060Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-04-10T18:59:19.526Z"},"containers":{"cna":{"title":"ALSA: usb-audio: fix null pointer dereference on pointer cs_desc","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: fix null pointer dereference on pointer cs_desc\n\nThe pointer cs_desc return from snd_usb_find_clock_source could\nbe null, so there is a potential null pointer dereference issue.\nFix this by adding a null check before dereference."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1dc669fed61a4ec4270a89e5fb3535802cc45668","status":"affected","lessThan":"3455984b16eeb6914caf8b59498ef24fcc1f0a78","versionType":"git"},{"version":"1dc669fed61a4ec4270a89e5fb3535802cc45668","status":"affected","lessThan":"58fa50de595f152900594c28ec9915c169643739","versionType":"git"},{"version":"1dc669fed61a4ec4270a89e5fb3535802cc45668","status":"affected","lessThan":"b97053df0f04747c3c1e021ecbe99db675342954","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/clock.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.10","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.5","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/clock.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3455984b16eeb6914caf8b59498ef24fcc1f0a78"},{"url":"https://git.kernel.org/stable/c/58fa50de595f152900594c28ec9915c169643739"},{"url":"https://git.kernel.org/stable/c/b97053df0f04747c3c1e021ecbe99db675342954"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-19T11:57:06.060Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.15.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10","versionEndExcluding":"5.16"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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