CVE-2023-52887 Information

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 18EC80901014000303002301; send second RTS cansend vcan0 18EC80901014000303002301; send abort cansend vcan0 18EC8090ff00000000002301; done

Reference

https://git.kernel.org/stable/c/ed581989d7ea9df6f8646beba2341e32cd49a1f9 https://git.kernel.org/stable/c/f6c839e717901dbd6b1c1ca807b6210222eb70f6 https://git.kernel.org/stable/c/1762ca80c2b72dd1b5821c5e347713ae696276ea https://git.kernel.org/stable/c/26b18dd30e63d4fd777be429148e8e4ed66f60b2 https://git.kernel.org/stable/c/177e33b655d35d72866b50aec84307119dc5f3d4 https://git.kernel.org/stable/c/0bc0a7416ea73f79f915c9a05ac0858dff65cfed https://git.kernel.org/stable/c/d3e2904f71ea0fe7eaff1d68a2b0363c888ea0fb