Type confusion in V8 in Google Chrome prior to 91.0.4472.101 allowed a remote attacker to potentially exploit heap corruption via a crafted
Affects Google Chrome and Chromium before 91.0.4472.114 on all architectures, per Gentoo's package listing. The CVE record names 91.0.4472.101 as the fix, while Gentoo lists 91.0.4472.114.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 91.0.4472.101
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Google Chrome, the web browser, is affected by a flaw in its V8 JavaScript engine that could let a remote attacker corrupt memory and potentially take control of the browser. The attacker could exploit this by tricking a user into opening a specially crafted web page.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Type confusion in V8 in Google Chrome prior to 91.0.4472.101 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Google Chrome
From unspecified · fixed in 91.0.4472.101
References 6
chromereleases.googleblog.com
crbug.com
security.gentoo.org
Questions about CVE-2021-30551
What does this mean?
This is a type confusion bug in V8, Chrome's JavaScript engine, which can lead to heap memory corruption. The CVE description says a remote attacker could potentially exploit this heap corruption.Source: security.gentoo.org
Am I affected, and how do I check?
Gentoo's package listing covers Google Chrome and Chromium on all architectures before 91.0.4472.114, and the CVE record gives 91.0.4472.101 as the fixed version. To check a version, open the About page in Chrome or run the browser's version command.Source: security.gentoo.org
What should I do about it?
Update to Chrome 91.0.4472.114 or later, the version Gentoo lists as the fix. The CVE record names 91.0.4472.101 as fixed, so 91.0.4472.114 is the newer of the two stated fix versions.Source: security.gentoo.org
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2021-11-03, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data