pi.c in OpenJPEG, as used in PDFium in Google Chrome before 48.0.2564.109, does not validate a certain precision value, which allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via a crafted JPEG 2000 image in a PDF document, related to the opj_pi_next_rpcl, opj_pi_next_pcrl, and opj_pi_next_cprl functions.
https://security.gentoo.org/glsa/201710-26
https://security.gentoo.org/glsa/201603-09
https://codereview.chromium.org/1590593002
https://code.google.com/p/chromium/issues/detail?id=571479
http://www.zerodayinitiative.com/advisories/ZDI-16-172/
http://www.securitytracker.com/id/1035183
http://www.securityfocus.com/bid/83125
http://www.debian.org/security/2017/dsa-4013
http://www.debian.org/security/2016/dsa-3486
http://rhn.redhat.com/errata/RHSA-2016-0241.html
http://googlechromereleases.blogspot.com/2016/02/stable-channel-update_9.html