This update includes 48 security fixes. Below, we highlight fixes that were contributed by external researchers. Please see the Chromium security page for more information.
[$15000] High CVE-2016-1706: Sandbox escape in PPAPI. Credit to Pinkie Pie
[$3000] High CVE-2016-1707: URL spoofing on iOS. Credit to xisigr of Tencent's Xuanwu Lab
[$TBD] High CVE-2016-1708: Use-after-free in Extensions. Credit to Adam Varsan
[$TBD] High CVE-2016-1709: Heap-buffer-overflow in sfntly. Credit to ChenQin of Topsec Security Team
[$TBD] High CVE-2016-1710: Same-origin bypass in Blink. Credit to Mariusz Mlynski
[$TBD] High CVE-2016-1711: Same-origin bypass in Blink. Credit to Mariusz Mlynski
[$TBD] High CVE-2016-5127: Use-after-free in Blink. Credit to cloudfuzzer
[$TBD] High CVE-2016-5128: Same-origin bypass in V8. Credit to Anonymous
[$TBD] High CVE-2016-5129: Memory corruption in V8. Credit to Jeonghoon Shin
[$TBD] High CVE-2016-5130: URL spoofing. Credit to Wadih Matar
[$TBD] High CVE-2016-5131: Use-after-free in libxml. Credit to Nick Wellnhofer
[$1000] Medium CVE-2016-5132: Limited same-origin bypass in Service Workers. Credit to Ben Kelly
[$1000] Medium CVE-2016-5133: Origin confusion in proxy authentication. Credit to Patch Eudor
[$500] Medium CVE-2016-5134: URL leakage via PAC script. Credit to Paul Stone
[$500] Medium CVE-2016-5135: Content-Security-Policy bypass. Credit to kingxwy
[$TBD] Medium CVE-2016-5136: Use after free in extensions. Credit to Rob Wu
[$TBD] Medium CVE-2016-5137: History sniffing with HSTS and CSP. Credit to Xiaoyin Liu
We would also like to thank all security researchers that worked with us during the development cycle to prevent security bugs from ever reaching the stable channel.
As usual, our ongoing internal security work was responsible for a wide range of fixes:
 CVE-2016-1705: Various fixes from internal audits, fuzzing and other initiatives.
Many of our security bugs are detected using AddressSanitizer, MemorySanitizer, Control Flow Integrity or LibFuzzer.
Please stabilize www-client/chromium-52.0.2743.82.
Maintainer(s), please cleanup.
Security, please add it to the existing request, or file a new one.
There is also CVE-2016-5138: Integer overflow in the kbasep_vinstr_attach_client function in midgard/mali_kbase_vinstr.c in Google Chrome before 52.0.2743.85 allows remote attackers to cause a denial of service (heap-based buffer overflow and use-after-free) by leveraging an unrestricted multiplication.
(In reply to Haelwenn Monnier from comment #5)
CVE-2016-5138 applies to Google Chrome as deployed on Chrome OS. There was no corresponding release for desktop Linux.
Added to an existing GLSA Request.
This issue was resolved and addressed in
GLSA 201610-09 at https://security.gentoo.org/glsa/201610-09
by GLSA coordinator Kristian Fiskerstrand (K_F).
*** Bug 589816 has been marked as a duplicate of this bug. ***