{"id":"CVE-2021-47091","state":"PUBLISHED","title":"mac80211: fix locking in ieee80211_start_ap error path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmac80211: fix locking in ieee80211_start_ap error path\n\nWe need to hold the local->mtx to release the channel context,\nas even encoded by the lockdep_assert_held() there. Fix it.","publishedAt":"2024-03-04T18:10:31.390Z","updatedAt":"2026-05-11T13:47:52.309Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"295b02c4be74bebf988593b8322369513fcecf68","status":"affected","lessThan":"ac61b9c6c0549aaeb98194cf429d93c41bfe5f79","versionType":"git"},{"version":"295b02c4be74bebf988593b8322369513fcecf68","status":"affected","lessThan":"c1d1ec4db5f7264cfc21993e59e8f2dcecf4b44f","versionType":"git"},{"version":"295b02c4be74bebf988593b8322369513fcecf68","status":"affected","lessThan":"87a270625a89fc841f1a7e21aae6176543d8385c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/cfg.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.89","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.12","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":["net/mac80211/cfg.c"]}],"references":["https://git.kernel.org/stable/c/ac61b9c6c0549aaeb98194cf429d93c41bfe5f79","https://git.kernel.org/stable/c/c1d1ec4db5f7264cfc21993e59e8f2dcecf4b44f","https://git.kernel.org/stable/c/87a270625a89fc841f1a7e21aae6176543d8385c"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47091.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47091","state":"PUBLISHED","datePublished":"2024-03-04T18:10:31.390Z","dateUpdated":"2026-05-11T13:47:52.309Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-02-29T22:33:44.300Z"},"containers":{"cna":{"title":"mac80211: fix locking in ieee80211_start_ap error path","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmac80211: fix locking in ieee80211_start_ap error path\n\nWe need to hold the local->mtx to release the channel context,\nas even encoded by the lockdep_assert_held() there. Fix it."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"295b02c4be74bebf988593b8322369513fcecf68","status":"affected","lessThan":"ac61b9c6c0549aaeb98194cf429d93c41bfe5f79","versionType":"git"},{"version":"295b02c4be74bebf988593b8322369513fcecf68","status":"affected","lessThan":"c1d1ec4db5f7264cfc21993e59e8f2dcecf4b44f","versionType":"git"},{"version":"295b02c4be74bebf988593b8322369513fcecf68","status":"affected","lessThan":"87a270625a89fc841f1a7e21aae6176543d8385c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/cfg.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.89","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.12","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":["net/mac80211/cfg.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ac61b9c6c0549aaeb98194cf429d93c41bfe5f79"},{"url":"https://git.kernel.org/stable/c/c1d1ec4db5f7264cfc21993e59e8f2dcecf4b44f"},{"url":"https://git.kernel.org/stable/c/87a270625a89fc841f1a7e21aae6176543d8385c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T13:47:52.309Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.10.89"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.16"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47091","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-03-04T19:39:17.212156Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-07-05T17:22:07.060Z"}},{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/ac61b9c6c0549aaeb98194cf429d93c41bfe5f79","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c1d1ec4db5f7264cfc21993e59e8f2dcecf4b44f","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/87a270625a89fc841f1a7e21aae6176543d8385c","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T05:24:39.957Z"}}]}}}