The Program::getUniformInternal function in Program.cpp in libANGLE, as used in Google Chrome before 49.0.2623.108, does not properly handle a certain data-type mismatch, which allows remote attackers to cause a denial of service (buffer overflow) or possibly have unspecified other impact via crafted shader stages.
https://security.gentoo.org/glsa/201605-02
https://code.google.com/p/chromium/issues/detail?id=595836
https://chromium-review.googlesource.com/334448
http://www.zerodayinitiative.com/advisories/ZDI-16-224
http://www.ubuntu.com/usn/USN-2955-1
http://www.securitytracker.com/id/1035423
http://www.debian.org/security/2016/dsa-3531
http://rhn.redhat.com/errata/RHSA-2016-0525.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00039.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00000.html
http://googlechromereleases.blogspot.com/2016/03/stable-channel-update_24.html