CVE-2026-22997
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-25

Last updated on: 2026-04-27

Assigner: kernel.org

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.
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Meta Information
Published
2026-01-25
Last Modified
2026-04-27
Generated
2026-06-16
AI Q&A
2026-01-25
EPSS Evaluated
2026-06-15
NVD
CVE-2026-22997
Affected Vendors & Products
Showing 11 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.13 (inc) to 6.18.7 (exc)
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 5.11 (inc) to 5.15.199 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.162 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.122 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.67 (exc)
linux linux_kernel From 5.4 (inc) to 5.10.249 (exc)
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel's CAN J1939 protocol stack involves improper session deactivation. Specifically, the function j1939_session_deactivate_activate_next() is not called when a timer is cancelled, leading to a reference count leak for j1939_session. This causes the system to hang while waiting for a network device (like vcan0) to become free, due to the usage count not decrementing properly.

Impact Analysis

The vulnerability can cause resource leaks in the Linux kernel's network stack, leading to network devices not being properly released. This can result in system instability or denial of service conditions where network interfaces remain busy and unavailable.

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