CVE-2023-6546

High

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.

Package Linux Kernel
Published 2023-12-21
Last modified 2026-02-18
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

7.0

out of 10
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-366

CVE-2023-6546 is classified as CWE-366

See CWE-366 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2023-6546 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2023-6546?

    CVE-2023-6546 is a High severity Linux kernel vulnerability with a CVSS score of 7.0 out of 10 . CVE-2023-6546 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2023-6546?

    CVE-2023-6546 has a CVSS score of 7.0 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2023-6546?

    No patch is currently available for CVE-2023-6546. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2023-6546 actively exploited?

    No — CVE-2023-6546 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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