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AUSCERT External Security Bulletin Redistribution
Stable Channel Update for Desktop
21 April 2021
AusCERT Security Bulletin Summary
Product: Google Chrome
Operating System: Windows
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-2021-21226 CVE-2021-21225 CVE-2021-21224
Comment: Google is aware of reports that exploits for CVE-2021-21224 exist in the wild.
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Stable Channel Update for Desktop
Tuesday, April 20, 2021
The Stable channel has been updated to 90.0.4430.85 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
haven't yet fixed.
This update includes 7 security fixes. Below, we highlight fixes that were
contributed by external researchers. Please see the Chrome Security Page for
[$TBD] High CVE-2021-21222: Heap buffer overflow in V8. Reported by
Guang Gong of Alpha Lab, Qihoo 360 on 2021-03-30
[$TBD] High CVE-2021-21223: Integer overflow in Mojo. Reported by
Guang Gong of Alpha Lab, Qihoo 360 on 2021-04-02
[$TBD] High CVE-2021-21224: Type Confusion in V8. Reported by Jose
Martinez (tr0y4) from VerSprite Inc. on 2021-04-05
[$TBD] High CVE-2021-21225: Out of bounds memory access in V8.
Reported by Brendon Tiszka (@btiszka) supporting the EFF on 2021-04-05
[$TBD] High CVE-2021-21226: Use after free in navigation. Reported by
Brendon Tiszka (@btiszka) supporting the EFF on 2021-04-11
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
Google is aware of reports that exploits for CVE-2021-21224 exist in the
wild.As usual, our ongoing internal security work was responsible for a wide
range of fixes:
o  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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