CVE-2021-30561 Memory corruption in Chrome

What is CVE-2021-30561?

CVE-2021-30561 is a high-severity memory corruption vulnerability in Google Chrome, published on 3 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Weakness: CWE-843

Which versions are affected by CVE-2021-30561?

It affects 1 product.

Products include Google Chrome.

How do I fix CVE-2021-30561?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-30561 being exploited?

There is no known exploitation of CVE-2021-30561 in the wild and no public exploit code.

Other vulnerabilities in Google Chrome

• CVE-2022-4135 Google Chromium GPU Heap Buffer Overflow Exploited Critical 9.6
• CVE-2020-16017 Google Chrome Use-After-Free Exploited Critical 9.6
• CVE-2020-16010 Google Chrome for Android UI Heap Buffer Overflow Exploited Critical 9.6
• CVE-2026-87491 Google Chromium V8 Out of Bounds Write Exploited High 8.8
• CVE-2026-85046 Google Chromium V8 Type Confusion Exploited High 8.8

All Google Chrome vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2024-BQ64651, DEBIAN-CVE-2021-30561, GHSA-mvq9-3rcf-xhcw, UBUNTU-CVE-2021-30561.