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CVE-2023-6546

A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel.

Impact

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

VendorProductAffected versions
LinuxLinux Kernel
before 6.5
Version 6.5
FedoraprojectFedora
Version 39
RedhatEnterprise Linux
Versions 8.0, 9.0

Weakness classification

CWE-366CWE-362

References