🛡️ CVE-2023-6546 — enterprise-linux
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.
How this vulnerability can be exploited
This issue can be reached with local access to the system, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack vector: Local — a local account, shell or session on the host is needed.
- Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
- Privileges required: Low — an ordinary user account is enough.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: High — total loss, or loss the attacker controls.
- Integrity impact: High — total loss, or loss the attacker controls.
- Availability impact: High — total loss, or loss the attacker controls.
Weakness class
CVE-2023-6546 is classified as CWE-366: Race Condition within a Thread. If two threads of execution use a resource simultaneously, there exists the possibility that resources may be used while invalid, in turn making the state of execution undefined.
Affected software
CVE-2023-6546 is recorded against 3 packages.
- enterprise-linux
- fedora
- linux-kernel
Timeline and source
Published on 21 December 2023 and last revised on 6 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.
References
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Other advisories for this package
enterprise-linux has other advisories on record. If you are patching this one, these are worth checking on the same host:
- CVE-2026-59091 (7.3 High, published 10 Aug 2026)
- CVE-2026-59090 (8.4 High, published 10 Aug 2026)
- CVE-2026-59088 (5.5 Medium, published 10 Aug 2026)
- CVE-2026-59087 (7.8 High, published 10 Aug 2026)
- CVE-2026-71226 (7.3 High, published 5 Aug 2026)
- CVE-2026-71225 (6.5 Medium, published 5 Aug 2026)
- CVE-2026-71227 (5.1 Medium, published 5 Aug 2026)
- CVE-2026-68744 (3.3 Low, published 4 Aug 2026)
Same weakness in other software
These advisories are the same class of weakness (CWE-366: Race Condition within a Thread) in other software:
- CVE-2026-46181 (7.8 High, published 28 May 2026)
- CVE-2026-3904 (6.2 Medium, published 11 Mar 2026)
- CVE-2026-23684 (5.9 Medium, published 10 Feb 2026)
- CVE-2026-22819 (5.9 Medium, published 13 Jan 2026)
- CVE-2025-58143 (9.8 Critical, published 11 Sep 2025)
- CVE-2025-31115 (published 3 Apr 2025)
- CVE-2024-10630 (7.8 High, published 14 Jan 2025)
- CVE-2023-4732 (4.7 Medium, published 3 Oct 2023)
CVE-2023-6546 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| enterprise-linux | — | — |
| fedora | — | — |
| linux-kernel | — | — |
References
Similar Threats
- Medium CVE-2022-0851
- High CVE-2022-0358
- Medium CVE-2022-0480
- Medium CVE-2022-0485
- Medium CVE-2022-0852
Site Security Check
Is enterprise-linux part of your stack?
CVE-2023-6546 is rated CVSS 7.0 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.
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