{"id":"CVE-2022-49309","state":"PUBLISHED","title":"drivers: staging: rtl8723bs: Fix deadlock in rtw_surveydone_event_callback()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: staging: rtl8723bs: Fix deadlock in rtw_surveydone_event_callback()\n\nThere is a deadlock in rtw_surveydone_event_callback(),\nwhich is shown below:\n\n   (Thread 1)                  |      (Thread 2)\n                               | _set_timer()\nrtw_surveydone_event_callback()|  mod_timer()\n spin_lock_bh() //(1)          |  (wait a time)\n ...                           | rtw_scan_timeout_handler()\n del_timer_sync()              |  spin_lock_bh() //(2)\n (wait timer to stop)          |  ...\n\nWe hold pmlmepriv->lock in position (1) of thread 1 and use\ndel_timer_sync() to wait timer to stop, but timer handler\nalso need pmlmepriv->lock in position (2) of thread 2.\nAs a result, rtw_surveydone_event_callback() will block forever.\n\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_bh(), which could let timer handler to obtain\nthe needed lock. What`s more, we change spin_lock_bh() in\nrtw_scan_timeout_handler() to spin_lock_irq(). Otherwise,\nspin_lock_bh() will also cause deadlock() in timer handler.","publishedAt":"2025-02-26T02:10:40.167Z","updatedAt":"2026-08-12T23:58:24.178Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fb127a61c9d8dfd9b370ee173344d01711f3c698","status":"affected","lessThan":"c84e5c819600ee0628f61b33d145258ae0f3d7a7","versionType":"git"},{"version":"fb127a61c9d8dfd9b370ee173344d01711f3c698","status":"affected","lessThan":"f89f6c3ebf69623b8ea48200bd690e9e210335a1","versionType":"git"},{"version":"fb127a61c9d8dfd9b370ee173344d01711f3c698","status":"affected","lessThan":"ce129d3efd181da5fd56f4360cc8827122afa67e","versionType":"git"},{"version":"fb127a61c9d8dfd9b370ee173344d01711f3c698","status":"affected","lessThan":"2c41f5c341853f84b7bc2f32605d4e2782e8c279","versionType":"git"},{"version":"fb127a61c9d8dfd9b370ee173344d01711f3c698","status":"affected","lessThan":"cc7ad0d77b51c872d629bcd98aea463a3c4109e7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/staging/rtl8723bs/core/rtw_mlme.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.237","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.47","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.15","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.4","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/staging/rtl8723bs/core/rtw_mlme.c"]}],"references":["https://git.kernel.org/stable/c/c84e5c819600ee0628f61b33d145258ae0f3d7a7","https://git.kernel.org/stable/c/f89f6c3ebf69623b8ea48200bd690e9e210335a1","https://git.kernel.org/stable/c/ce129d3efd181da5fd56f4360cc8827122afa67e","https://git.kernel.org/stable/c/2c41f5c341853f84b7bc2f32605d4e2782e8c279","https://git.kernel.org/stable/c/cc7ad0d77b51c872d629bcd98aea463a3c4109e7","https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49309.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49309","state":"PUBLISHED","datePublished":"2025-02-26T02:10:40.167Z","dateUpdated":"2026-08-12T23:58:24.178Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T02:08:31.536Z"},"containers":{"cna":{"title":"drivers: staging: rtl8723bs: Fix deadlock in rtw_surveydone_event_callback()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: staging: rtl8723bs: Fix deadlock in rtw_surveydone_event_callback()\n\nThere is a deadlock in rtw_surveydone_event_callback(),\nwhich is shown below:\n\n   (Thread 1)                  |      (Thread 2)\n                               | _set_timer()\nrtw_surveydone_event_callback()|  mod_timer()\n spin_lock_bh() //(1)          |  (wait a time)\n ...                           | rtw_scan_timeout_handler()\n del_timer_sync()              |  spin_lock_bh() //(2)\n (wait timer to stop)          |  ...\n\nWe hold pmlmepriv->lock in position (1) of thread 1 and use\ndel_timer_sync() to wait timer to stop, but timer handler\nalso need pmlmepriv->lock in position (2) of thread 2.\nAs a result, rtw_surveydone_event_callback() will block forever.\n\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_bh(), which could let timer handler to obtain\nthe needed lock. What`s more, we change spin_lock_bh() in\nrtw_scan_timeout_handler() to spin_lock_irq(). Otherwise,\nspin_lock_bh() will also cause deadlock() in timer handler."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fb127a61c9d8dfd9b370ee173344d01711f3c698","status":"affected","lessThan":"c84e5c819600ee0628f61b33d145258ae0f3d7a7","versionType":"git"},{"version":"fb127a61c9d8dfd9b370ee173344d01711f3c698","status":"affected","lessThan":"f89f6c3ebf69623b8ea48200bd690e9e210335a1","versionType":"git"},{"version":"fb127a61c9d8dfd9b370ee173344d01711f3c698","status":"affected","lessThan":"ce129d3efd181da5fd56f4360cc8827122afa67e","versionType":"git"},{"version":"fb127a61c9d8dfd9b370ee173344d01711f3c698","status":"affected","lessThan":"2c41f5c341853f84b7bc2f32605d4e2782e8c279","versionType":"git"},{"version":"fb127a61c9d8dfd9b370ee173344d01711f3c698","status":"affected","lessThan":"cc7ad0d77b51c872d629bcd98aea463a3c4109e7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/staging/rtl8723bs/core/rtw_mlme.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.237","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.47","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.17.15","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.4","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/staging/rtl8723bs/core/rtw_mlme.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c84e5c819600ee0628f61b33d145258ae0f3d7a7"},{"url":"https://git.kernel.org/stable/c/f89f6c3ebf69623b8ea48200bd690e9e210335a1"},{"url":"https://git.kernel.org/stable/c/ce129d3efd181da5fd56f4360cc8827122afa67e"},{"url":"https://git.kernel.org/stable/c/2c41f5c341853f84b7bc2f32605d4e2782e8c279"},{"url":"https://git.kernel.org/stable/c/cc7ad0d77b51c872d629bcd98aea463a3c4109e7"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-12T23:58:24.178Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.10.237"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.47"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.17.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.18.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T19:27:51.491Z"}}]}}}