{"id":"CVE-2022-49303","summary":"drivers: staging: rtl8192eu: Fix deadlock in rtw_joinbss_event_prehandle","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: staging: rtl8192eu: Fix deadlock in rtw_joinbss_event_prehandle\n\nThere is a deadlock in rtw_joinbss_event_prehandle(), which is shown below:\n\n   (Thread 1)                |      (Thread 2)\n                             | _set_timer()\nrtw_joinbss_event_prehandle()|  mod_timer()\n spin_lock_bh() //(1)        |  (wait a time)\n ...                         | rtw_join_timeout_handler()\n                             |  _rtw_join_timeout_handler()\n del_timer_sync()            |   spin_lock_bh() //(2)\n (wait timer to stop)        |   ...\n\nWe hold pmlmepriv-\u003elock in position (1) of thread 1 and\nuse del_timer_sync() to wait timer to stop, but timer handler\nalso need pmlmepriv-\u003elock in position (2) of thread 2.\nAs a result, rtw_joinbss_event_prehandle() 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() to\nspin_lock_irq() in _rtw_join_timeout_handler() in order to\nprevent deadlock.","modified":"2026-04-02T08:27:28.985997Z","published":"2025-02-26T02:10:37.056Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49303.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0fcddf9c7c10202946d5b19409efbdff744fba88"},{"type":"WEB","url":"https://git.kernel.org/stable/c/25cf414b0610fea29d8e045f315648d9007c9a46"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49303.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49303"},{"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":"15865124feed880978b79839c756ef6cbb4ec6b3"},{"fixed":"25cf414b0610fea29d8e045f315648d9007c9a46"},{"fixed":"0fcddf9c7c10202946d5b19409efbdff744fba88"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49303.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"}]}