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AUSCERT External Security Bulletin Redistribution
Stable Channel Update for Desktop
18 June 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
CVE Names: CVE-2021-30557 CVE-2021-30556 CVE-2021-30555
Comment: Google is aware that an exploit for CVE-2021-30554 exists in the wild.
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Stable Channel Update for Desktop
Thursday, June 17, 2021
The Stable channel has been updated to 91.0.4472.114 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 4 security fixes. Below, we highlight fixes that were
contributed by external researchers. Please see the Chrome Security Page for
[$TBD] High CVE-2021-30554: Use after free in WebGL. Reported by
anonymous on 2021-06-15
[$10000] High CVE-2021-30555: Use after free in Sharing. Reported by
David Erceg on 2021-06-01
[$7500] High CVE-2021-30556: Use after free in WebAudio. Reported by
Yangkang (@dnpushme) of 360 ATA on 2021-05-24
[$10000] High CVE-2021-30557: Use after free in TabGroups. Reported by
David Erceg on 2021-04-23
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 that an exploit for CVE-2021-30554 exists in the wild.
Many of our security bugs are detected using AddressSanitizer, MemorySanitizer,
UndefinedBehaviorSanitizer, Control Flow Integrity, libFuzzer, or AFL.
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