CVE-2023-21127 Memory corruption in Android

What is CVE-2023-21127?

CVE-2023-21127 is a high-severity memory corruption vulnerability in Google Android, published on 15 Jun 2023. 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

In readSampleData of NuMediaExtractor.cpp, there is a possible out of bounds write due to uninitialized data. This could lead to remote code execution with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-11 Android-12 Android-12L Android-13Android ID: A-275418191

Weakness: CWE-908

Which versions are affected by CVE-2023-21127?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2023-21127?

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-2023-21127 being exploited?

There is no known exploitation of CVE-2023-21127 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-275418191, ASB-A-275418191, GHSA-6w5q-cg43-pm5x.