The Extensions subsystem in Google Chrome before 48.0.2564.109 does not prevent use of the Object.defineProperty method to override intended extension behavior, which allows remote attackers to bypass the Same Origin Policy via crafted JavaScript code.

The DOM implementation in Google Chrome before 48.0.2564.109 does not properly restrict frame-attach operations from occurring during or after frame-detach operations, which allows remote attackers to bypass the Same Origin Policy via a crafted web site, related to FrameLoader.cpp, HTMLFrameOwnerElement.h, LocalFrame.cpp, and WebLocalFrameImpl.cpp.

Integer underflow in the ProcessCommandsInternal function in dec/decode.c in Brotli, as used in Google Chrome before 48.0.2564.109, allows remote attackers to cause a denial of service (buffer overflow) or possibly have unspecified other impact via crafted data with brotli compression.

The Chrome Instant feature in Google Chrome before 48.0.2564.109 does not ensure that a New Tab Page (NTP) navigation target is on the most-visited or suggestions list, which allows remote attackers to bypass intended restrictions via unspecified vectors, related to instant_service.cc and search_tab_helper.cc.

The opj_pi_update_decode_poc function in pi.c in OpenJPEG, as used in PDFium in Google Chrome before 48.0.2564.109, miscalculates a certain layer index value, which allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted PDF document.