{"id":"CVE-2025-71182","summary":"can: j1939: make j1939_session_activate() fail if device is no longer registered","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: make j1939_session_activate() fail if device is no longer registered\n\nsyzbot is still reporting\n\n  unregister_netdevice: waiting for vcan0 to become free. Usage count = 2\n\neven after commit 93a27b5891b8 (\"can: j1939: add missing calls in\nNETDEV_UNREGISTER notification handler\") was added. A debug printk() patch\nfound that j1939_session_activate() can succeed even after\nj1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER)\nhas completed.\n\nSince j1939_cancel_active_session() is processed with the session list lock\nheld, checking ndev-\u003ereg_state in j1939_session_activate() with the session\nlist lock held can reliably close the race window.","modified":"2026-04-02T17:29:52.170639664Z","published":"2026-01-31T11:38:55.157Z","related":["SUSE-SU-2026:0962-1","SUSE-SU-2026:1081-1","SUSE-SU-2026:20667-1","SUSE-SU-2026:20720-1","SUSE-SU-2026:20838-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","SUSE-SU-2026:20931-1","openSUSE-SU-2026:20416-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71182.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/46ca9dc978923c5e1247a9e9519240ba7ace413c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d5602236f5db19e8b337a2cd87a90ace5ea776d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/78d87b72cebe2a993fd5b017e9f14fb6278f2eae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/79dd3f1d9dd310c2af89b09c71f34d93973b200f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c3a4316e3c746af415c0fd6c6d489ad13f53714d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ebb0dfd718dd31c8d3600612ca4b7207ec3d923a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71182.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-71182"},{"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":"9d71dd0c70099914fcd063135da3c580865e924c"},{"fixed":"ebb0dfd718dd31c8d3600612ca4b7207ec3d923a"},{"fixed":"c3a4316e3c746af415c0fd6c6d489ad13f53714d"},{"fixed":"46ca9dc978923c5e1247a9e9519240ba7ace413c"},{"fixed":"78d87b72cebe2a993fd5b017e9f14fb6278f2eae"},{"fixed":"ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536"},{"fixed":"79dd3f1d9dd310c2af89b09c71f34d93973b200f"},{"fixed":"5d5602236f5db19e8b337a2cd87a90ace5ea776d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71182.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.4.0"},{"fixed":"5.10.248"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.198"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.161"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.121"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.66"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71182.json"}}],"schema_version":"1.7.5"}