CVE-2021-38003

criticalknown exploitedpublic exploitcovered by 1 sourcefirst seen 2021-11-03

Actively exploited. CVE-2021-38003 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

Public exploit code is available. Proof-of-concept or working exploit code for CVE-2021-38003 is indexed in GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation.

Google Chromium V8 Engine has a bug in JSON.stringify, where the internal TheHole value can leak to script code, causing memory corruption. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

CSIRTS triage

What: A bug in JSON.stringify can lead to memory corruption.
Who is affected: Users of web browsers utilizing the Chromium V8 engine.
Urgency: Remediation is urgent due to active exploitation and critical severity.
Action: Update to the latest version of 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 98% of all EPSS-scored CVEs.

Exploit availability

Public exploit or proof-of-concept code for CVE-2021-38003 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.

GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗

Advisory coverage (1)

criticalexploitedCVE-2021-38003: Google Chromium V8 Memory Corruption Vulnerabilitycisa-kev · 2021-11-03

External references

NVD record for CVE-2021-38003

CVE.org record

CISA KEV catalog

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