PT-2023-9753 · Linux+3 · Linux Kernel+3
Daniel Starke
·
Published
2023-10-26
·
Updated
2025-02-03
·
CVE-2023-52872
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
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.
Exploit
Race Condition
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Red Os
Suse