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Google Patches Two More Exploited Zero-Day Vulnerabilities in Chrome

Google on Thursday announced the rollout of a Chrome update to address four security vulnerabilities, including two that are already being exploited in the wild.

Google on Thursday announced the rollout of a Chrome update to address four security vulnerabilities, including two that are already being exploited in the wild.

The exploited vulnerabilities include CVE-2021-37975, a high-severity use-after-free bug in the V8 engine, and CVE-2021-37976, a medium-severity information leak issue in the core. Both were reported last week.

“Google is aware the exploits for CVE-2021-37975 and CVE-2021-37976 exist in the wild,” the Internet search giant says.

Now rolling out to Windows, Mac and Linux users as Chrome version 94.0.4606.71, the new browser iteration also addresses CVE-2021-37974, a high-severity use-after-free in Safe Browsing.

Google says the report for this vulnerability earned the reporting researcher, namely Weipeng Jiang from Codesafe Team of Legendsec at Qi’anxin Group, a $20,000 bug bounty reward.

Exploitation of these vulnerabilities may lead to the execution of arbitrary code in the context of the browser, the Multi-State Information Sharing and Analysis Center (MS-ISAC) warns in an advisory. Successful exploitation may potentially lead to system compromise.

The update comes roughly one week after Google issued an emergency patch for CVE-2021-37973, a high-severity use-after-free issue in the Portals API that was already being exploited in attacks.

With CVE-2021-37975 and CVE-2021-37976, the number of documented zero-day attacks so far in 2021 has been rounded up to 70. Of these, 14 security flaws were found in Google’s Chrome and Android platforms, data reviewed by SecurityWeek shows.

Related: Google Working on Improving Memory Safety in Chrome

Related: Google Warns of Exploited Zero-Days in Chrome Browser

Related: Google Awards Over $130,000 for Flaws Patched With Release of Chrome 93

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

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