CVE-2023-52941 Information

Mar 28, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

can: isotp: split tx timer into transmission and timeout

The timer for the transmission of isotp PDUs formerly had two functions:

  1. send two consecutive frames with a given time gap
  2. monitor the timeouts for flow control frames and the echo frames

This led to larger txstate checks and potentially to a problem discovered by syzbot which enabled the panic_on_warn feature while testing.

The former ’txtimer’ function is split into ’txfrtimer’ and ’txtimer' to handle the two above functionalities with separate timer callbacks.

The two simplified timers now run in one-shot mode and make the state transitions (especially with isotp_rcv_echo) better understandable.

Reference

https://git.kernel.org/stable/c/4f027cba8216f42a18b544842efab134f8b1f9f4 https://git.kernel.org/stable/c/cae4c9bc35f72af5d4a079bb9d9fd62c4088a411

Share on: