CVE-2023-52872

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to a race condition in the status line change on dead connections in the Linux kernel's tty: n gsm component. The gsm cleanup mux() function cleans up the gsm by closing all DLCIs, stopping all timers, removing the virtual tty devices, and clearing the data queues. However, this procedure may cause subsequent changes to the virtual modem status lines of a DLCI, leading to a kernel panic. The fix involves proving in gsm modem update() that the cleanup procedure has not been started and the mux is still alive. Writing to a virtual tty is already protected by checks against the DLCI specific connection state.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.