CVE-2023-6546
CWE-366Published: December 21, 2023· Updated: Jun 17, 2026
Official 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.
Technical Analysis
CVE-2023-6546 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.0.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (53)
Quick Facts
Related CVEs (CWE-366)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-6546 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts