Is there a public exploit for CVE-2023-6546?

Yes. Proof-of-concept code for CVE-2023-6546 has been published publicly.

Is there a proof of concept for CVE-2023-6546?

Yes — 1 proof-of-concept entry is linked on this page, from public repositories and community submissions. They are listed for authorised testing only.

How severe is CVE-2023-6546?

CVE-2023-6546 scores CVSS 7 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.74%.

What does CVE-2023-6546 affect?

CVE-2023-6546 affects Red Hat RHOL-5.7-RHEL-8, Red Hat Virtualization 4 for Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.2 Extended Update Support.

7.0 High

A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel.

CVE-2023-6546

A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two threads execute the GSMIOCSETCONF 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 gsmdlci while restarting the gsm mux. This could allow a local unprivileged user to escalate their privileges on the system.

Proof-of-concept code is published

Public PoC

Public PoCharithlab/CVE-2023-65461 stars

Signals come from Exploit-DB, Metasploit, Nuclei and published proof-of-concept repositories. Their absence means nothing was found, not that nothing exists.

Assessment

CVSS: 7 (v3.1)
Severity: High
EPSS: 0.74% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Public PoC
Published: 21 December 2023
Last updated: 4 November 2026
Affected: Red Hat · RHOL-5.7-RHEL-8 · Red Hat Enterprise Linux 8 · Red Hat Enterprise Linux 8.2 Advanced Update Support · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Assigner: redhat

CVSS vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

At the source

EUVD (ENISA)

References

Community proofs of concept

No community proof of concept yet. If you have one for a published vulnerability and the right to share it, add it below — it will appear here once reviewed.

Submit a proof of concept

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Before you submit * This vulnerability is already publicly disclosed (it has a published CVE). This material comes only from testing I was authorised to perform. I have the legal right to publish this content and am not breaching any agreement by doing so. It contains no live credentials, personal data, or anything targeting systems I am not authorised to test. I understand it will be reviewed before it appears publicly and may be rejected. I agree to the submission terms.

What is 7 + 8? *

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