CVE-2023-6546

Published: Dec 21, 2023

Modified: Feb 18, 2026

PUBLISHED

CVSS v3.1

7.0

HIGH

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.

Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 8	unaffected `0:4.18.0-513.24.1.rt7.326.el8_9 - < *`
Red Hat	Red Hat Enterprise Linux 8	unaffected `0:4.18.0-513.24.1.el8_9 - < *`
Red Hat	Red Hat Enterprise Linux 8	All versions
Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support	unaffected `0:4.18.0-193.136.1.el8_2 - < *`
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	unaffected `0:4.18.0-305.134.1.el8_4 - < *`
Red Hat	Red Hat Enterprise Linux 8.4 Telecommunications Update Service	unaffected `0:4.18.0-305.134.1.rt7.210.el8_4 - < *`
Red Hat	Red Hat Enterprise Linux 8.4 Telecommunications Update Service	unaffected `0:4.18.0-305.134.1.el8_4 - < *`
Red Hat	Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions	unaffected `0:4.18.0-305.134.1.el8_4 - < *`
Red Hat	Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions	All versions
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support	unaffected `0:4.18.0-372.93.1.el8_6 - < *`
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support	All versions
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support	unaffected `0:4.18.0-477.55.1.el8_8 - < *`
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support	All versions
Red Hat	Red Hat Enterprise Linux 9	unaffected `0:5.14.0-427.13.1.el9_4 - < *`
Red Hat	Red Hat Enterprise Linux 9	unaffected `0:5.14.0-427.13.1.el9_4 - < *`
Red Hat	Red Hat Enterprise Linux 9.0 Extended Update Support	unaffected `0:5.14.0-70.93.2.el9_0 - < *`
Red Hat	Red Hat Enterprise Linux 9.0 Extended Update Support	unaffected `0:5.14.0-70.93.1.rt21.165.el9_0 - < *`
Red Hat	Red Hat Enterprise Linux 9.0 Extended Update Support	All versions
Red Hat	Red Hat Enterprise Linux 9.2 Extended Update Support	unaffected `0:5.14.0-284.55.1.el9_2 - < *`
Red Hat	Red Hat Enterprise Linux 9.2 Extended Update Support	unaffected `0:5.14.0-284.55.1.rt14.340.el9_2 - < *`
Red Hat	Red Hat Enterprise Linux 9.2 Extended Update Support	All versions
Red Hat	Red Hat Virtualization 4 for Red Hat Enterprise Linux 8	unaffected `0:4.18.0-372.93.1.el8_6 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v5.7.13-16 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v5.7.13-7 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v6.8.1-408 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v5.7.13-19 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v1.0.0-480 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v5.7.13-9 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v0.4.0-248 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v1.14.6-215 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v6.8.1-431 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v1.1.0-228 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v5.8.1-471 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v2.9.6-15 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v5.7.13-3 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v5.7.13-27 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v5.7.13-12 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v0.1.0-527 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v0.1.0-225 - < *`
Red Hat	RHOL-5.7-RHEL-8	unaffected `v0.28.1-57 - < *`
Red Hat	Red Hat Enterprise Linux 6	All versions
Red Hat	Red Hat Enterprise Linux 7	All versions
Red Hat	Red Hat Enterprise Linux 7	All versions
Red Hat	Red Hat Enterprise Linux 9	All versions