{"id":"CVE-2022-49942","state":"PUBLISHED","title":"wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected\n\nWhen we are not connected to a channel, sending channel \"switch\"\nannouncement doesn't make any sense.\n\nThe BSS list is empty in that case. This causes the for loop in\ncfg80211_get_bss() to be bypassed, so the function returns NULL\n(check line 1424 of net/wireless/scan.c), causing the WARN_ON()\nin ieee80211_ibss_csa_beacon() to get triggered (check line 500\nof net/mac80211/ibss.c), which was consequently reported on the\nsyzkaller dashboard.\n\nThus, check if we have an existing connection before generating\nthe CSA beacon in ieee80211_ibss_finish_csa().","publishedAt":"2025-06-18T10:59:57.610Z","updatedAt":"2026-05-11T19:09:39.486Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"cdb9a8da9b84800eb15506cd9363cf0cf059e677","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"1691a48aef0a82d1754b9853dae7e3f5cacdf70b","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"d9eb37db6a28b59a95a3461450ee209654c5f95b","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"66689c5c02acd4d76c28498fe220998610aec61e","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"dd649b49219a0388cc10fc40e4c2ea681566a780","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"552ba102a6898630a7d16887f29e606d6fabe508","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"864e280cb3a9a0f5212b16ef5057c4e692f7039d","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/ibss.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.13","versionType":"semver"},{"version":"4.9.328","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.293","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.258","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.213","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.142","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.66","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.19.8","status":"unaffected","lessThanOrEqual":"5.19.*","versionType":"semver"},{"version":"6.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/ibss.c"]}],"references":["https://git.kernel.org/stable/c/cdb9a8da9b84800eb15506cd9363cf0cf059e677","https://git.kernel.org/stable/c/1691a48aef0a82d1754b9853dae7e3f5cacdf70b","https://git.kernel.org/stable/c/d9eb37db6a28b59a95a3461450ee209654c5f95b","https://git.kernel.org/stable/c/66689c5c02acd4d76c28498fe220998610aec61e","https://git.kernel.org/stable/c/dd649b49219a0388cc10fc40e4c2ea681566a780","https://git.kernel.org/stable/c/552ba102a6898630a7d16887f29e606d6fabe508","https://git.kernel.org/stable/c/864e280cb3a9a0f5212b16ef5057c4e692f7039d","https://git.kernel.org/stable/c/15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49942.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49942","state":"PUBLISHED","datePublished":"2025-06-18T10:59:57.610Z","dateUpdated":"2026-05-11T19:09:39.486Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-06-18T10:57:27.381Z"},"containers":{"cna":{"title":"wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected\n\nWhen we are not connected to a channel, sending channel \"switch\"\nannouncement doesn't make any sense.\n\nThe BSS list is empty in that case. This causes the for loop in\ncfg80211_get_bss() to be bypassed, so the function returns NULL\n(check line 1424 of net/wireless/scan.c), causing the WARN_ON()\nin ieee80211_ibss_csa_beacon() to get triggered (check line 500\nof net/mac80211/ibss.c), which was consequently reported on the\nsyzkaller dashboard.\n\nThus, check if we have an existing connection before generating\nthe CSA beacon in ieee80211_ibss_finish_csa()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"cdb9a8da9b84800eb15506cd9363cf0cf059e677","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"1691a48aef0a82d1754b9853dae7e3f5cacdf70b","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"d9eb37db6a28b59a95a3461450ee209654c5f95b","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"66689c5c02acd4d76c28498fe220998610aec61e","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"dd649b49219a0388cc10fc40e4c2ea681566a780","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"552ba102a6898630a7d16887f29e606d6fabe508","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"864e280cb3a9a0f5212b16ef5057c4e692f7039d","versionType":"git"},{"version":"cd7760e62c2ac8581f050b2d36501d1a60beaf83","status":"affected","lessThan":"15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/ibss.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.13","versionType":"semver"},{"version":"4.9.328","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.293","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.258","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.213","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.142","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.66","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.19.8","status":"unaffected","lessThanOrEqual":"5.19.*","versionType":"semver"},{"version":"6.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/ibss.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/cdb9a8da9b84800eb15506cd9363cf0cf059e677"},{"url":"https://git.kernel.org/stable/c/1691a48aef0a82d1754b9853dae7e3f5cacdf70b"},{"url":"https://git.kernel.org/stable/c/d9eb37db6a28b59a95a3461450ee209654c5f95b"},{"url":"https://git.kernel.org/stable/c/66689c5c02acd4d76c28498fe220998610aec61e"},{"url":"https://git.kernel.org/stable/c/dd649b49219a0388cc10fc40e4c2ea681566a780"},{"url":"https://git.kernel.org/stable/c/552ba102a6898630a7d16887f29e606d6fabe508"},{"url":"https://git.kernel.org/stable/c/864e280cb3a9a0f5212b16ef5057c4e692f7039d"},{"url":"https://git.kernel.org/stable/c/15bc8966b6d3a5b9bfe4c9facfa02f2b69b1e5f0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:09:39.486Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"4.9.328"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"4.14.293"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"4.19.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"5.4.213"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"5.10.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"5.15.66"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"5.19.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"6.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}