CVE-2023-6546
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.
- Affected products
- Alt Linux, Almalinux, Astra Linux, Centos, Linux Kernel, Red Hat, Red Os, Rocky Linux
- Linux Linux Kernel
- < 6.5
- CVSS 3.1
- 7.0 HIGH
- EPSS
- 0.8% (53th percentile)
- Weakness
- CWE-362, CWE-366
- NVD status
- Modified
- Published
- 2023-12-21
Workaround
This flaw can be mitigated by preventing the affected `n_gsm` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.
CVE-2023-6546 at NVD
1 known exploit for CVE-2023-6546
Proof-of-concept code and exploit modules indexed by Sploitus