A regression was discovered in the security update for libxvmc, causing segfaults with some applications. Updated packages are available to address this problem. For reference, the original advisory text follows. Ilja van Sprundel of IOActive discovered several security issues in multiple components of the X.org graphics stack and the related libraries: Various integer overflows, sign handling errors in integer conversions, buffer overflows, memory corruption and missing input sanitising may lead to privilege escalation or denial of service.