{"id":"CVE-2022-50833","summary":"Bluetooth: use hdev-\u003eworkqueue when queuing hdev-\u003e{cmd,ncmd}_timer works","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: use hdev-\u003eworkqueue when queuing hdev-\u003e{cmd,ncmd}_timer works\n\nsyzbot is reporting attempt to schedule hdev-\u003ecmd_work work from system_wq\nWQ into hdev-\u003eworkqueue WQ which is under draining operation [1], for\ncommit c8efcc2589464ac7 (\"workqueue: allow chained queueing during\ndestruction\") does not allow such operation.\n\nThe check introduced by commit 877afadad2dce8aa (\"Bluetooth: When HCI work\nqueue is drained, only queue chained work\") was incomplete.\n\nUse hdev-\u003eworkqueue WQ when queuing hdev-\u003e{cmd,ncmd}_timer works because\nhci_{cmd,ncmd}_timeout() calls queue_work(hdev-\u003eworkqueue). Also, protect\nthe queuing operation with RCU read lock in order to avoid calling\nqueue_delayed_work() after cancel_delayed_work() completed.","modified":"2026-04-02T08:28:47.173441Z","published":"2025-12-30T12:10:54.342Z","related":["SUSE-SU-2026:0263-1","SUSE-SU-2026:0317-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50833.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3c6b036fe5c8ed8b6c4cbdc03605929882907ef0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c4635cf3d845a7324c25c52d549b70c8bd7ad4c7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/deee93d13d385103205879a8a0915036ecd83261"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50833.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50833"},{"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":"3b382555706558f5c0587862b6dc03e96a252bba"},{"fixed":"c4635cf3d845a7324c25c52d549b70c8bd7ad4c7"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"877afadad2dce8aae1f2aad8ce47e072d4f6165e"},{"fixed":"3c6b036fe5c8ed8b6c4cbdc03605929882907ef0"},{"fixed":"deee93d13d385103205879a8a0915036ecd83261"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"4bf367fa1fefabdf14938d0ac9ed60020389112e"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50833.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.19.15"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.20.0"},{"fixed":"6.0.1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50833.json"}}],"schema_version":"1.7.5"}