DEBIAN-CVE-2025-71182

Advisory lineage Upstream: 1 Downstream: 4
Upstream
CVE-2025-71182
Published: 31 Jan 2026, 12:16
Last modified:28 Apr 2026, 20:31

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

31 Jan 2026, 12:16
Published
Vulnerability first disclosed
28 Apr 2026, 20:31
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Systems

  • debian•linux

    all | all | all | all | < 5.10.249-1 | < 6.1.162-1 | < 6.12.69-1 | < 6.18.8-1

  • debian•linux-6.1

    all | < 6.1.162-1~deb11u1

References (1)