CVE-2023-52887: net: can: j1939: enhanced error handling for tightly received RTS messages in xtp_rx_rts_session_new

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-29 · updated 2026-08-04
Weakness: CWE-617

Description

In the Linux kernel, the following vulnerability has been resolved: net: can: j1939: enhanced error handling for tightly received RTS messages in xtp_rx_rts_session_new This patch enhances error handling in scenarios with RTS (Request to Send) messages arriving closely. It replaces the less informative WARN_ON_ONCE backtraces with a new error handling method. This provides clearer error messages and allows for the early termination of problematic sessions. Previously, sessions were only released at the end of j1939_xtp_rx_rts(). Potentially this could be reproduced with something like: testj1939 -r vcan0:0x80 & while true; do # send first RTS cansend vcan0 18EC8090#1014000303002301; # send second RTS cansend vcan0 18EC8090#1014000303002301; # send abort cansend vcan0 18EC8090#ff00000000002301; done

Affected products

Linux kernel: from 5.4 before 5.4.279; from 5.5 before 5.10.221; from 5.11 before 5.15.162; from 5.16 before 6.1.97; from 6.2 before 6.6.37; from 6.7 before 6.9.8 — fixed in 5.10.221, 5.15.162, 5.4.279, 6.1.97, 6.6.37, 6.9.8

How to fix

Upgrade to a fixed version: Linux kernel 5.10.221, 5.15.162, 5.4.279, 6.1.97. Check the vendor advisory for mitigations.

References

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