{"id":"CVE-2022-49305","summary":"drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()\n\nThere is a deadlock in ieee80211_beacons_stop(), which is shown below:\n\n   (Thread 1)              |      (Thread 2)\n                           | ieee80211_send_beacon()\nieee80211_beacons_stop()   |  mod_timer()\n spin_lock_irqsave() //(1) |  (wait a time)\n ...                       | ieee80211_send_beacon_cb()\n del_timer_sync()          |  spin_lock_irqsave() //(2)\n (wait timer to stop)      |  ...\n\nWe hold ieee-\u003ebeacon_lock in position (1) of thread 1 and use\ndel_timer_sync() to wait timer to stop, but timer handler\nalso need ieee-\u003ebeacon_lock in position (2) of thread 2.\nAs a result, ieee80211_beacons_stop() will block forever.\n\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_irqsave(), which could let timer handler to obtain\nthe needed lock.","modified":"2026-04-02T08:27:28.249001Z","published":"2025-02-26T02:10:38.212Z","related":["SUSE-SU-2025:01600-1","SUSE-SU-2025:1027-1","SUSE-SU-2025:1176-1","SUSE-SU-2025:1183-1","SUSE-SU-2025:1194-1","SUSE-SU-2025:1241-1","SUSE-SU-2025:1263-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49305.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/042915c1bfedd684c1d98a841794ee203200571a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1fbe033c52480f7954c057510040fa6286c4ea25"},{"type":"WEB","url":"https://git.kernel.org/stable/c/66f769762f65d957f688f3258755c6ec410bf710"},{"type":"WEB","url":"https://git.kernel.org/stable/c/806c7b53414934ba2a39449b31fd1a038e500273"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b34cb54923a6e5ddefbaf358c85c922c6ab456e2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b465bb2ebf666116c1ac745cb80c65154dc0d27e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ffc9cab7243f8151be37966301307bfd3cda2db3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49305.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49305"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8fc8598e61f6f384f3eaf1d9b09500c12af47b37"},{"fixed":"b465bb2ebf666116c1ac745cb80c65154dc0d27e"},{"fixed":"1fbe033c52480f7954c057510040fa6286c4ea25"},{"fixed":"66f769762f65d957f688f3258755c6ec410bf710"},{"fixed":"042915c1bfedd684c1d98a841794ee203200571a"},{"fixed":"ffc9cab7243f8151be37966301307bfd3cda2db3"},{"fixed":"b34cb54923a6e5ddefbaf358c85c922c6ab456e2"},{"fixed":"806c7b53414934ba2a39449b31fd1a038e500273"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49305.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}