CVE-2023-20940 Weak cryptography in Android

What is CVE-2023-20940?

CVE-2023-20940 is a high-severity vulnerability in Google Android, published on 28 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Android operating system, there is a possible way to replace a boot partition due to improperly used crypto. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-256237041

Weakness: CWE-347

Which versions are affected by CVE-2023-20940?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2023-20940?

Apply the vendor's patch.

Is CVE-2023-20940 being exploited?

There is no known exploitation of CVE-2023-20940 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-256237041, ASB-A-256237041, GHSA-5rc8-v3hv-cqcg.