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Vulnerabilities CVE-2023-6546

CVE-2023-6546

High
Open
TLP:CLEAR

Kernel: gsm multiplexing race condition leads to privilege escalation

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Description

A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two threads execute the GSMIOC_SETCONF ioctl on the same tty file descriptor with the gsm line discipline enabled, and can lead to a use-after-free problem on a struct gsm_dlci while restarting the gsm mux. This could allow a local unprivileged user to escalate their privileges on the system.

Details

CVSS Score
7.0
EPSS Score
0.77%

52.3th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
Dec 21, 2023
Last Modified
Aug 6, 2026
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