CVE-2023-6546

CVE-2023-6546 · Kernel: gsm multiplexing race condition leads to privilege escalation

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

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.

CVSS 7.0 · High · EPSS 0.7% · Fix available

Published: 2023-12-21T20:01:03.217Z
Updated: 2026-08-06T19:08:45.886Z

Stack: system

Affected products and versions

red hat enterprise linux 8
Versions
- ≥ 0:4.18.0-513.24.1.rt7.326.el8_9: Not affected (rpm)
No fix published
red hat enterprise linux 8
Versions
- ≥ 0:4.18.0-513.24.1.el8_9: Not affected (rpm)
No fix published
red hat enterprise linux 8
No fix published
red hat enterprise linux 8.2 advanced update support
Versions
- ≥ 0:4.18.0-193.136.1.el8_2: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 advanced mission critical update support
Versions
- ≥ 0:4.18.0-305.134.1.el8_4: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 telecommunications update service
Versions
- ≥ 0:4.18.0-305.134.1.rt7.210.el8_4: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 telecommunications update service
Versions
- ≥ 0:4.18.0-305.134.1.el8_4: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 update services for sap solutions
Versions
- ≥ 0:4.18.0-305.134.1.el8_4: Not affected (rpm)
No fix published
red hat enterprise linux 8.4 update services for sap solutions
No fix published
red hat enterprise linux 8.6 extended update support
Versions
- ≥ 0:4.18.0-372.93.1.el8_6: Not affected (rpm)
No fix published
red hat enterprise linux 8.6 extended update support
No fix published
red hat enterprise linux 8.8 extended update support
Versions
- ≥ 0:4.18.0-477.55.1.el8_8: Not affected (rpm)
No fix published
red hat enterprise linux 8.8 extended update support
No fix published
red hat enterprise linux 9
Versions
- ≥ 0:5.14.0-427.13.1.el9_4: Not affected (rpm)
No fix published
red hat enterprise linux 9.0 extended update support
Versions
- ≥ 0:5.14.0-70.93.2.el9_0: Not affected (rpm)
No fix published
red hat enterprise linux 9.0 extended update support
Versions
- ≥ 0:5.14.0-70.93.1.rt21.165.el9_0: Not affected (rpm)
No fix published
red hat enterprise linux 9.0 extended update support
No fix published
red hat enterprise linux 9.2 extended update support
Versions
- ≥ 0:5.14.0-284.55.1.el9_2: Not affected (rpm)
No fix published
red hat enterprise linux 9.2 extended update support
Versions
- ≥ 0:5.14.0-284.55.1.rt14.340.el9_2: Not affected (rpm)
No fix published
red hat enterprise linux 9.2 extended update support
No fix published
red hat virtualization 4 for red hat enterprise linux 8
Versions
- ≥ 0:4.18.0-372.93.1.el8_6: Not affected (rpm)
No fix published
rhol-5.7-rhel-8
Versions
- ≥ v5.7.13-16: Not affected (rpm)
No fix published
rhol-5.7-rhel-8
Versions
- ≥ v5.7.13-7: Not affected (rpm)
No fix published
rhol-5.7-rhel-8
Versions
- ≥ v6.8.1-408: Not affected (rpm)
No fix published

Original sources

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