CVE-2023-6546

HIGH 7.0

Kernel: gsm multiplexing race condition leads to privilege escalation

CVSS Score

7.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-366
Vendor	red hat
Product	red hat enterprise linux 8
Published	Dec 21, 2023
Last Updated	Feb 18, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 8.2 Advanced Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 8.4 Telecommunications Update Service

All versions affected

Red Hat / Red Hat Enterprise Linux 8.4 Telecommunications Update Service

All versions affected

Red Hat / Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions

All versions affected

Red Hat / Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions

All versions affected

Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 8.8 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 8.8 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

Red Hat / Red Hat Enterprise Linux 9.0 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 9.0 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 9.0 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support

All versions affected

Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support

All versions affected

Red Hat / Red Hat Virtualization 4 for Red Hat Enterprise Linux 8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / RHOL-5.7-RHEL-8

All versions affected

Red Hat / Red Hat Enterprise Linux 6

All versions affected

Red Hat / Red Hat Enterprise Linux 7

All versions affected

Red Hat / Red Hat Enterprise Linux 7

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗