CVE-2025-71182None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: can: j1939: make j1939_session_activate() fail if device is no longer registered syzbot is still reporting unregister_netdevice: waiting for vcan0 to become free. U…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
can: j1939: make j1939_session_activate() fail if device is no longer registered
syzbot is still reporting
unregister_netdevice: waiting for vcan0 to become free. Usage count = 2
even after commit 93a27b5891b8 ("can: j1939: add missing calls in NETDEV_UNREGISTER notification handler") was added. A debug printk() patch found that j1939_session_activate() can succeed even after j1939_cancel_active_session() from j1939_netdev_notify(NETDEV_UNREGISTER) has completed.
Since j1939_cancel_active_session() is processed with the session list lock held, checking ndev->reg_state in j1939_session_activate() with the session list lock held can reliably close the race window.
Linux >= 9d71dd0c70099914fcd063135da3c580865e924c < ebb0dfd718dd31c8d3600612ca4b7207ec3d923aLinux >= 9d71dd0c70099914fcd063135da3c580865e924c < c3a4316e3c746af415c0fd6c6d489ad13f53714dLinux >= 9d71dd0c70099914fcd063135da3c580865e924c < 46ca9dc978923c5e1247a9e9519240ba7ace413cLinux >= 9d71dd0c70099914fcd063135da3c580865e924c < 78d87b72cebe2a993fd5b017e9f14fb6278f2eaeLinux >= 9d71dd0c70099914fcd063135da3c580865e924c < ba6f0d1832eeb5eb3a6dc5cb30e0f720b3cb3536Linux >= 9d71dd0c70099914fcd063135da3c580865e924c < 79dd3f1d9dd310c2af89b09c71f34d93973b200fLinux >= 9d71dd0c70099914fcd063135da3c580865e924c < 5d5602236f5db19e8b337a2cd87a90ace5ea776dLinux 5.4Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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