CVE-2023-6546 Information

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.

Reference

https://access.redhat.com/security/cve/CVE-2023-6546 https://bugzilla.redhat.com/show_bug.cgi?id=2255498 https://github.com/torvalds/linux/commit/3c4f8333b582487a2d1e02171f1465531cde53e3