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.
Exploit-prediction probability, daily snapshots since Oct 19.
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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