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CVE-2023-6546

Kernel: gsm multiplexing race condition leads to privilege escalation

Published: 12/21/2023 Last updated: 8/6/2026 Reserved: 12/6/2023

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.

CNA assigner: redhat (53f830b8-0a3f-465b-8143-3b8a9948e749) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 7 High CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Opam packages affected (29)

albatross cdrom conf-bpftool conf-libbpf conf-linux-libc-dev core core_unix hvsock mirage-block-unix mm ocaml-probes ortools_solvers orun rawlink rawlink-eio rawlink-lwt restricted shell solo5 solo5-bindings-hvt solo5-bindings-spt solo5-cross-aarch64 solo5-kernel-ukvm tracy-client tuntap uring vhd-format vhd-format-lwt xapi-stdext-unix

Products affected (71)

Product Vendor Version
Red Hat Enterprise Linux 6 Red Hat < *
Red Hat Enterprise Linux 9.2 Extended Update Support Red Hat n/a
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat n/a
Red Hat Enterprise Linux 9.0 Extended Update Support Red Hat < 10.0.22000.2176
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat < publication
Red Hat Enterprise Linux 8.6 Extended Update Support Red Hat n/a
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat < 10.0.17763.5206
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat < publication
Red Hat Enterprise Linux 9 Red Hat < 10.0.20348.2159
Red Hat Enterprise Linux 9.0 Extended Update Support Red Hat < 10.0.25398.584
Red Hat Enterprise Linux 6 Red Hat n/a
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Red Hat <= 4.11.3
Red Hat Enterprise Linux 9.2 Extended Update Support Red Hat < 6.0.6003.22413
Red Hat Enterprise Linux 7 Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 Red Hat < 6.1.7601.26864
Red Hat Enterprise Linux 8.6 Extended Update Support Red Hat n/a
Red Hat Enterprise Linux 8.8 Extended Update Support Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat < *
Red Hat Enterprise Linux 9.2 Extended Update Support Red Hat < 6.0.6003.22413
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat n/a
Red Hat Enterprise Linux 9.0 Extended Update Support Red Hat < 10.0.14393.6529
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat n/a
Red Hat Enterprise Linux 9.0 Extended Update Support Red Hat < 6.0.6003.22175
Red Hat Enterprise Linux 8.4 Telecommunications Update Service Red Hat n/a
Red Hat Enterprise Linux 9.2 Extended Update Support Red Hat < 6.0.6003.22413
Red Hat Enterprise Linux 8 Red Hat n/a
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Red Hat 4.9.3
Red Hat Enterprise Linux 8.8 Extended Update Support Red Hat < 10.0.17763.5206
Red Hat Enterprise Linux 9.0 Extended Update Support Red Hat < 10.0.14393.6529
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions Red Hat n/a
Red Hat Enterprise Linux 8.6 Extended Update Support Red Hat n/a
Red Hat Enterprise Linux 8.8 Extended Update Support Red Hat < OMS Agent for Linux GA v1.14.13
Red Hat Enterprise Linux 9.0 Extended Update Support Red Hat < 6.3.9600.21063
RHOL-5.7-RHEL-8 Red Hat < 6.1.7601.26864
RHOL-5.7-RHEL-8 Red Hat 7.4
RHOL-5.7-RHEL-8 Red Hat < 6.2.9200.24614
RHOL-5.7-RHEL-8 Red Hat n/a
RHOL-5.7-RHEL-8 Red Hat < 6.2.9200.24614
RHOL-5.7-RHEL-8 Red Hat 3.1.0
RHOL-5.7-RHEL-8 Red Hat < 6.3.9600.21715
RHOL-5.7-RHEL-8 Red Hat < 6.3.9600.21715
RHOL-5.7-RHEL-8 Red Hat unspecified
RHOL-5.7-RHEL-8 Red Hat n/a
RHOL-5.7-RHEL-8 Red Hat 2.0
RHOL-5.7-RHEL-8 Red Hat 2.1
RHOL-5.7-RHEL-8 Red Hat n/a
RHOL-5.7-RHEL-8 Red Hat 12.0.0
RHOL-5.7-RHEL-8 Red Hat 11.0.1
RHOL-5.7-RHEL-8 Red Hat n/a
RHOL-5.7-RHEL-8 Red Hat n/a
RHOL-5.7-RHEL-8 Red Hat 11.0.0
RHOL-5.7-RHEL-8 Red Hat 4.0.0
RHOL-5.7-RHEL-8 Red Hat < 2.14.18rc1
RHOL-5.7-RHEL-8 Red Hat n/a
RHOL-5.7-RHEL-8 Red Hat < 2.15.13rc1
RHOL-5.7-RHEL-8 Red Hat < 2.16.13rc1
RHOL-5.7-RHEL-8 Red Hat < 2.17.6rc1
RHOL-5.7-RHEL-8 Red Hat n/a
RHOL-5.7-RHEL-8 Red Hat n/a
RHOL-5.7-RHEL-8 Red Hat < 2.18.0rc2
RHOL-5.7-RHEL-8 Red Hat < *
RHOL-5.7-RHEL-8 Red Hat n/a
RHOL-5.7-RHEL-8 Red Hat < *
RHOL-5.7-RHEL-8 Red Hat n/a

References (106)