A flaw was found in the Linux kernel’s sof_set_get_large_ctrl_data function, in the way it handled memory cleanup in a specific error path. A local attacker could use this flaw to crash the system.

Mitigation

As the snd-sof module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions:

echo "install snd-sof /bin/true" >> /etc/modprobe.d/disable-snd-sof.conf

The system will need to be restarted if the snd-sof module is already loaded. In most circumstances, the snd-sof kernel module will be unable to be unloaded while the device is in use. If the system requires this module to work correctly, this mitigation may not be suitable. If you need further assistance, see KCS article <https://access.redhat.com/solutions/41278&gt; or contact Red Hat Global Support Services.