Security Fixes and Rewards

Note: Access to bug details and links may be kept restricted until a majority of users are updated with a fix. We will also retain restrictions if the bug exists in a third party library that other projects similarly depend on, but haven’t yet fixed.

This update includes 11 security fixes. Below, we highlight fixes that were contributed by external researchers. Please see the Chrome Security Page for more information.

[$7500][1237533] High CVE-2021-30625: Use after free in Selection API. Reported by Marcin Towalski of Cisco Talos on 2021-08-06

[$7500][1241036] High CVE-2021-30626: Out of bounds memory access in ANGLE. Reported by Jeonghoon Shin of Theori on 2021-08-18

[$5000][1245786] High CVE-2021-30627: Type Confusion in Blink layout. Reported by Aki Helin of OUSPG on 2021-09-01

[$TBD][1241123] High CVE-2021-30628: Stack buffer overflow in ANGLE. Reported by Jaehun Jeong(@n3sk) of Theori on 2021-08-18

[$TBD][1243646] High CVE-2021-30629: Use after free in Permissions. Reported by Weipeng Jiang (@Krace) from Codesafe Team of Legendsec at Qi'anxin Group on 2021-08-26

[$TBD][1244568] High CVE-2021-30630: Inappropriate implementation in Blink . Reported by SorryMybad (@S0rryMybad) of Kunlun Lab on 2021-08-30

[$TBD][1246932] High CVE-2021-30631: Type Confusion in Blink layout. Reported by Atte Kettunen of OUSPG on 2021-09-06

[$TBD][1247763] High CVE-2021-30632: Out of bounds write in V8. Reported by Anonymous on 2021-09-08

[$TBD][1247766] High CVE-2021-30633: Use after free in Indexed DB API. Reported by Anonymous on 2021-09-08

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.

Google is aware that exploits for CVE-2021-30632 and CVE-2021-30633 exist in the wild.

As usual, our ongoing internal security work was responsible for a wide range of fixes: