CVE-2021-0646 Memory corruption in Android

What is CVE-2021-0646?

CVE-2021-0646 is a high-severity memory corruption vulnerability in Google Android, published on 17 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In sqlite3_str_vappendf of sqlite3.c, there is a possible out of bounds write due to improper input validation. This could lead to local escalation of privilege if the user can also inject a printf into a privileged process's SQL with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11 Android-8.1Android ID: A-153352319

Weakness: CWE-787

Which versions are affected by CVE-2021-0646?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-0646?

Apply the vendor's patch.

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

Is CVE-2021-0646 being exploited?

There is no known exploitation of CVE-2021-0646 in the wild and no public exploit code.

Other vulnerabilities in Google Android

• CVE-2026-58704 Google Pixel Improper Authorization Exploited High 8.8
• CVE-2025-48543 Android Runtime Use-After-Free Exploited High 8.8
• CVE-2023-35674 Android Framework Privilege Escalation Exploited High 8.8
• CVE-2025-48595 Android Framework Integer Overflow Exploited High 8.4
• CVE-2024-32896 Android Pixel Privilege Escalation Exploited High 8.1

All Google Android vulnerabilities

Sources

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

Also known as A-153352319, ASB-A-153352319, GHSA-4pf8-rcwc-5q5p.