Description
In the Linux kernel, the following vulnerability has been resolved:
net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts
Since j1939_session_deactivate_activate_next() in j1939_tp_rxtimer() is called only when the timer is enabled, we need to call j1939_session_deactivate_activate_next() if we cancelled the timer. Otherwise, refcount for j1939_session leaks, which will later appear as
| unregister_netdevice: waiting for vcan0 to become free. Usage count = 2.
problem.
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 9d71dd0c70099914fcd063135da3c580865e924c, < a73e7d7e346dae1c22dc3e95b02ca464b12daf2c; >= 9d71dd0c70099914fcd063135da3c580865e924c, < adabf01c19561e42899da9de56a6a1da0e6b8a5b; >= 9d71dd0c70099914fcd063135da3c580865e924c, < b1d67607e97d489c0cfbbf55f48a76b00710b0e4; >= 9d71dd0c70099914fcd063135da3c580865e924c, < 809a437e27a3bf3c1c6c8c157773635552116f2b; >= 9d71dd0c70099914fcd063135da3c580865e924c, < cb2a610867bc379988bae0bb4b8bbc59c0decf1a; >= 9d71dd0c70099914fcd063135da3c580865e924c, < 6121b7564c725b632ffe4764abe85aa239d37703; >= 9d71dd0c70099914fcd063135da3c580865e924c, < 1809c82aa073a11b7d335ae932d81ce51a588a4a |
| Linux | Linux | 5.4 |
References
- https://git.kernel.org/stable/c/1809c82aa073a11b7d335ae932d81ce51a588a4aPatch
- https://git.kernel.org/stable/c/6121b7564c725b632ffe4764abe85aa239d37703Patch
- https://git.kernel.org/stable/c/809a437e27a3bf3c1c6c8c157773635552116f2bPatch
- https://git.kernel.org/stable/c/a73e7d7e346dae1c22dc3e95b02ca464b12daf2cPatch
- https://git.kernel.org/stable/c/adabf01c19561e42899da9de56a6a1da0e6b8a5bPatch
- https://git.kernel.org/stable/c/b1d67607e97d489c0cfbbf55f48a76b00710b0e4Patch
- https://git.kernel.org/stable/c/cb2a610867bc379988bae0bb4b8bbc59c0decf1aPatch
Timeline
- Published
- Jan 25, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Modified