CVE-2023-1872

A flaw was found in the io_uring subsystem of the Linux kernel. The io_file_get_fixed function lacks the presence of ctx->uring_lock, which can lead to a use-after-free vulnerability due to a race condition with fixed files getting unregistered. This flaw allows local privilege escalation.

Shipping releases of Red Hat Enterprise Linux kernels are not affected by this flaw, as they do not include support for the io_uring subsystem (CONFIG_IO_URING is not set).

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.