An information leak flaw was found in the Linux kernel’s USB digital video device driver. An attacker with a malicious USB device presenting itself as a ‘Technotrend/Hauppauge USB DEC’ device is able to issue commands to this specific device and leak kernel internal memory information. The highest threat from this vulnerability is a breach of data confidentiality.

Mitigation

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

echo "install ttusb_dec /bin/true" >> /etc/modprobe.d/disable-cifs.conf

The system will need to be restarted if the ttusb_dec module is already loaded. In most circumstances, the CIFS 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.