CVE-2024-38556

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.6.37

Description The issue is related to the net/mlx5 component of the Linux kernel, where a timeout has been added to acquire the command queue semaphore. This change prevents forced completion handling on an entry that has not yet been assigned an index, which could cause an out of bounds access. The kernel log example provided shows an instance of this issue, where the wait func handle exec timeout function is called with a command index of -22, resulting in a "No done completion" error for the CREATE UCTX command.

Recommendations Update to Linux kernel version 6.6.37 or later to resolve the issue. As a temporary workaround, consider disabling the net/mlx5 component until a patch is available. Restrict access to the vulnerable CREATE UCTX command to minimize the risk of exploitation. Avoid using the cmd index in the affected kernel log example until the issue is resolved.