Google has released Chrome 90.0.4430.85 to address an actively exploited zero-day and four other high severity security vulnerabilities impacting today's most popular web browser.

The version released on April 20th, 2021, to the Stable desktop channel for Windows, Mac, and Linux users will be rolling out to all users over the coming weeks.

Your daily dose of Smash Bros, general commentary, anime and memes. Videos every day at 10AM EST.

'Google is aware of reports that exploits for CVE-2021-21224 exist in the wild,' the company's announcement reads.

Are the ZeRo allegations true? Is his career done for good? I explain what happened and the misconduct that has resulted in extreme backlash to the pro playe. Our agenda is simple: The ZERO TO THREE Policy Center promotes good health, strong families, and positive early learning experiences for all infants and toddlers, with special emphasis on those who are the most vulnerable and in need. We would like to show you a description here but the site won’t allow us.

PoC dropped on Twitter, zero-day fixed one week later

Google did not share any details on the zero-day besides describing it as a 'Type Confusion in V8' and saying that it was reported by VerSprite Inc's Jose Martinez.

However, Martinez linked it to a proof-of-concept (PoC) exploit publicly shared on Twitter one week ago after his initial Chrome Vulnerability Reward Program report from April 5th.

This remote code execution vulnerability cannot be exploited by attackers to escape Chromium's sandbox security feature (a security feature designed to block exploits from accessing files or executing code on host computers).

However, it can easily be chained with another security bug that can allow the exploit to escape the sandbox and execute arbitrary code on the targeted users' systems.

The zero-day PoC for CVE-2021-21224 was dropped on Twitter one day after Google released Chrome 89.0.4389.128 to fix another zero-day bug with a PoC exploit publicly shared two days earlier.

hi haha right, I'm the original reporter.
Timeline:
5th April: I've submitted my bug to Google Chrome VRP report
12th April: I've submitted my RCE 0day exploit
12th April: Google patched v8 engine, but also made regress/unittest public
14th April: people viralized 1day exploit

Re Zero Twitter

— JosexD j0s3 tr0y4 (@JosexDDD) April 20, 2021

No details on zero-day attacks in the wild

Although Google says that it is aware CVE-2020-16009 active exploitation, the company did not provide any info on the threat actors behind these attacks.

Six Zero Twitter

'Access to bug details and links may be kept restricted until a majority of users are updated with a fix,' Google said.

'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.'

Google fixed three other high severity vulnerabilities in Chrome 90.0.4430.85:

• CVE-2021-21222: Heap buffer overflow in V8. Reported by Guang Gong of Alpha Lab, Qihoo 360 on 2021-03-30
• CVE-2021-21223: Integer overflow in Mojo. Reported by Guang Gong of Alpha Lab, Qihoo 360 on 2021-04-02
• CVE-2021-21225: Out of bounds memory access in V8. Reported by Brendon Tiszka (@btiszka) supporting the EFF on 2021-04-05
• CVE-2021-21226: Use after free in navigation. Reported by Brendon Tiszka (@btiszka) supporting the EFF on 2021-04