CVE-2021-4098
Published: 11 February 2022
Summary
CVE-2021-4098 is a high-severity Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367) vulnerability in Google Chrome. Its CVSS base score is 7.4 (High).
Operationally, ranked in the top 40.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-33983
Vulnerability details
Insufficient data validation in Mojo in Google Chrome prior to 96.0.4664.110 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Timestamps meeting UTC or offset standards help identify TOCTOU issues through precise chronological reconstruction of check/use operations.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.