A vulnerability was found in the Linux kernel’s core sound driver code. A use-after-free in a race condition between disconnection events could allow a local attacker who can trigger disconnection events (remove or add hardware) to crash the system, corrupt memory, or escalate privileges.

Mitigation

As the snd 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 /bin/true" >> /etc/modprobe.d/disable-snd.conf

The system will need to be restarted if the snd modules are loaded. In most circumstances, the snd kernel modules will be unable to be unloaded while they are 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.