CVE-2023-1872 (linux_kernel)

A use-after-free vulnerability in the Linux Kernel io_uring system can be exploited to achieve local privilege escalation.

The io_file_get_fixed function lacks the presence of ctx->uring_lock which can lead to a Use-After-Free vulnerability due a race condition with fixed files getting unregistered.

We recommend upgrading past commit da24142b1ef9fd5d36b76e36bab328a5b27523e8.

ctx cve escalation exploited files free function kernel linux linux kernel local local privilege escalation privilege privilege escalation race condition system use-after-free vulnerability