Google Chrome before 40.0.2214.91, when the Harmony proxy in Google V8 is enabled, allows remote attackers to bypass the Same Origin Policy via crafted JavaScript code with Proxy.create and console.log calls, related to HTTP responses that lack an "X-Content-Type-Options: nosniff" header.

The Fonts implementation in Google Chrome before 40.0.2214.91 does not initialize memory for a data structure, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via unknown vectors.

The SelectionOwner::ProcessTarget function in ui/base/x/selection_owner.cc in the UI implementation in Google Chrome before 40.0.2214.91 uses an incorrect data type for a certain length value, which allows remote attackers to cause a denial of service (out-of-bounds read) via crafted X11 data.

The Regular Expressions package in International Components for Unicode (ICU) 52 before SVN revision 292944, as used in Google Chrome before 40.0.2214.91, allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via vectors related to a look-behind expression.

Google V8, as used in Google Chrome before 38.0.2125.101, does not properly track JavaScript heap-memory allocations as allocations of uninitialized memory and does not properly concatenate arrays of double-precision floating-point numbers, which allows remote attackers to obtain sensitive information via crafted JavaScript code, related to the PagedSpace::AllocateRaw and NewSpace::AllocateRaw functions in heap/spaces-inl.h, the LargeObjectSpace::AllocateRaw function in heap/spaces.cc, and the Runtime_ArrayConcat function in runtime.cc.

The NavigationScheduler::schedulePageBlock function in core/loader/NavigationScheduler.cpp in Blink, as used in Google Chrome before 38.0.2125.101, does not properly provide substitute data for pages blocked by the XSS auditor, which allows remote attackers to obtain sensitive information via a crafted web site.

The wrap function in bindings/core/v8/custom/V8EventCustom.cpp in the V8 bindings in Blink, as used in Google Chrome before 38.0.2125.101, has an erroneous fallback outcome for wrapper-selection failures, which allows remote attackers to cause a denial of service via vectors that trigger stopping a worker process that had been handling an Event object.

The chrome_pdf::CopyImage function in pdf/draw_utils.cc in the PDFium component in Google Chrome before 38.0.2125.101 does not properly validate image-data dimensions, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via unknown vectors.

The SessionService::GetLastSession function in browser/sessions/session_service.cc in Google Chrome before 38.0.2125.101 allows remote attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact via vectors that leverage "type confusion" for callback processing.

The Instance::HandleInputEvent function in pdf/instance.cc in the PDFium component in Google Chrome before 38.0.2125.101 interprets a certain -1 value as an index instead of a no-visible-page error code, which allows remote attackers to cause a denial of service (out-of-bounds read) via unspecified vectors.