What’s Vulnerable › Vulnerabilities

CVE-2026-22997: net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-25 · updated 2026-10-19
• Weakness: CWE-772

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.

Affected products

• Linux kernel: from 5.4 before 5.10.249; from 5.11 before 5.15.199; from 5.16 before 6.1.162; from 6.2 before 6.6.122; from 6.7 before 6.12.67; from 6.13 before 6.18.7 — fixed in 5.10.249, 5.15.199, 6.1.162, 6.12.67, 6.18.7, 6.6.122

How to fix

Upgrade to a fixed version: Linux kernel 5.10.249, 5.15.199, 6.1.162, 6.12.67. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1809c82aa073a11b7d335ae932d81ce51a588a4a
• https://git.kernel.org/stable/c/6121b7564c725b632ffe4764abe85aa239d37703
• https://git.kernel.org/stable/c/809a437e27a3bf3c1c6c8c157773635552116f2b
• https://git.kernel.org/stable/c/a73e7d7e346dae1c22dc3e95b02ca464b12daf2c
• https://git.kernel.org/stable/c/adabf01c19561e42899da9de56a6a1da0e6b8a5b
• https://git.kernel.org/stable/c/b1d67607e97d489c0cfbbf55f48a76b00710b0e4
• https://git.kernel.org/stable/c/cb2a610867bc379988bae0bb4b8bbc59c0decf1a

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