Google · Chromium V8
CVE-2021-38003
Google Chromium V8 Memory Corruption Vulnerability
What it is
Inappropriate implementation in V8 in Google Chrome prior to 95.0.4638.69 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
CISA: 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.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: November 17, 2021
More exploited flaws from Google
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Sep 9, 2026 | Out of Bounds Write | Chromium V8 | High 8.8 | 3.5% |
| Sep 4, 2026 | Type Confusion | Chromium V8 | High 8.8 | 1.8% |
| Jun 9, 2026 | Out-of-Bounds Read and Write | Chromium V8 | High 8.8 | 2.4% |
| Mar 13, 2026 | Improper Restriction of Operations Within the Bounds of a Memory Buffer | Chromium V8 | High 8.8 | 2.7% |
| Nov 19, 2025 | Type Confusion | Chromium V8 | High 8.8 | 4.9% |
| Sep 23, 2025 | Type Confusion | Chromium V8 | High 8.8 | 9.0% |
| Jul 2, 2025 | Type Confusion | Chromium V8 | High 8.1 | 14% |
| Jun 5, 2025 | Out-of-Bounds Read and Write | Chromium V8 | High 8.8 | 7.8% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.