CVE-2021-0511 Code injection in Android

What is CVE-2021-0511?

CVE-2021-0511 is a high-severity code injection vulnerability in Google Android, published on 21 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In Dex2oat of dex2oat.cc, there is a possible way to inject bytecode into an app due to improper input validation. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-9 Android-10 Android-11Android ID: A-178055795

Weakness: CWE-20

Which versions are affected by CVE-2021-0511?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-0511?

Apply the vendor's patch.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2021-0511 being exploited?

There is no known exploitation of CVE-2021-0511 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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-178055795, ASB-A-178055795, GHSA-mhw4-w4wq-p4wx.