CVE-2021-4102

criticalknown exploitedcovered by 1 sourcefirst seen 2021-12-15

Actively exploited. CVE-2021-4102 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-12-15) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

Google Chromium V8 Engine contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

CSIRTS triage

What: The Chromium V8 Engine has a use-after-free vulnerability that can lead to heap corruption.
Who is affected: Web browsers utilizing the Chromium engine, including Google Chrome, Microsoft Edge, and Opera.
Urgency: Immediate action is required as the vulnerability is actively exploited and rated critical.
Action: Update to the latest version of the affected browsers.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 94% of all EPSS-scored CVEs.

Advisory coverage (1)

criticalexploitedCVE-2021-4102: Google Chromium V8 Use-After-Free Vulnerabilitycisa-kev · 2021-12-15

External references

NVD record for CVE-2021-4102

CVE.org record

CISA KEV catalog

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