CVE-2026-22997
MEDIUMCVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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3Tags
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.
Analysis
The Linux kernel's CAN J1939 protocol implementation fails to properly deactivate sessions when receiving duplicate request-to-send messages, causing reference count leaks that prevent network device cleanup. A local attacker with user-level privileges can trigger this condition to cause a denial of service by exhausting kernel resources and preventing proper device unregistration. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.
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