Lucene search

K
debiancveDebian Security Bug TrackerDEBIANCVE:CVE-2023-52872
HistoryMay 21, 2024 - 4:15 p.m.

CVE-2023-52872

2024-05-2116:15:23
Debian Security Bug Tracker
security-tracker.debian.org
11
linux kernel
vulnerability
cve-2023-52872
gsm_cleanup_mux
race condition
status line change
dead connections
tty
n_gsm
kernel panic

AI Score

6.5

Confidence

Low

EPSS

0

Percentile

15.5%

In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix race condition in status line change on dead connections gsm_cleanup_mux() cleans up the gsm by closing all DLCIs, stopping all timers, removing the virtual tty devices and clearing the data queues. This procedure, however, may cause subsequent changes of the virtual modem status lines of a DLCI. More data is being added the outgoing data queue and the deleted kick timer is restarted to handle this. At this point many resources have already been removed by the cleanup procedure. Thus, a kernel panic occurs. Fix this by proving in gsm_modem_update() that the cleanup procedure has not been started and the mux is still alive. Note that writing to a virtual tty is already protected by checks against the DLCI specific connection state.

AI Score

6.5

Confidence

Low

EPSS

0

Percentile

15.5%