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AUSCERT External Security Bulletin Redistribution
Google Chrome: Stable Channel Update for Desktop
16 July 2021
AusCERT Security Bulletin Summary
Product: Google Chrome
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
CVE Names: CVE-2021-30564 CVE-2021-30563 CVE-2021-30562
CVE-2021-30561 CVE-2021-30560 CVE-2021-30559
Comment: There have been reports that an exploit for CVE-2021-30563 exists in the wild.
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Stable Channel Update for Desktop
Posted: 15 Jul 2021 11:42 AM PDT
The Stable channel has been updated to 91.0.4472.164 for Windows, Mac and
Linux which will roll out over the coming days/weeks.
A full list of changes in this build is available in the log. Interested in
switching release channels? Find out how here. If you find a new issue,
please let us know by filing a bug. The community help forum is also a
great place to reach out for help or learn about common issues.
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 havent yet fixed.
This update includes 8 security fixes. Below, we highlight fixes that were
contributed by external researchers. Please see the Chrome Security Page for
[$7500] High CVE-2021-30559: Out of bounds write in ANGLE.
Reported by Seong-Hwan Park (SeHwa) of SecunologyLab on 2021-06-11
[$5000] High CVE-2021-30541: Use after free in V8.
Reported by Richard Wheeldon on 2021-05-31
[$N/A] High CVE-2021-30560: Use after free in Blink XSLT. Reported by Nick Wellnhofer
[$TBD] High CVE-2021-30561: Type Confusion in V8.
Reported by Sergei Glazunov of Google Project Zero on
[$TBD] High CVE-2021-30562: Use after free in WebSerial.
Reported by Anonymous on 2021-06-15
[$TBD] High CVE-2021-30563:Type Confusion in V8. Reported by Anonymous on 2021-07-12
[$TBD] Medium CVE-2021-30564: Heap buffer overflow in WebXR. Reported by Ali
Merchant, iQ3Connect VR Platform on 2021-06-17
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 of reports that an exploit for CVE-2021-30563 exists in the
As usual, our ongoing internal security work was responsible for a wide
range of fixes:
 Various fixes from internal audits, fuzzing and other initiatives
Many of our security bugs are detected using AddressSanitizer,
MemorySanitizer, UndefinedBehaviorSanitizer, Control Flow Integrity,
libFuzzer, or AFL.
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