Red Hat: CVE-2023-6546: kernel: GSM multiplexing race condition leads to privilege escalation (Multiple Advisories)
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.
Solution(s)
- redhat-upgrade-kernel
- redhat-upgrade-kernel-rt
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