CVE-2018-9521 Memory corruption in Android

What is CVE-2018-9521?

CVE-2018-9521 is a high-severity memory corruption vulnerability in Google Android, published on 14 Nov 2018. 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 parseMPEGCCData of NuPlayer2CCDecoder.cpp, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote code execution in an unprivileged process with no additional execution privileges needed. User interaction is needed for exploitation. Product: Android. Versions: Android-9. Android ID: A-111874331

Weakness: CWE-787

Which versions are affected by CVE-2018-9521?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2018-9521?

No fix has been published for CVE-2018-9521 yet. Limit exposure of the affected software until one is available.

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

Is CVE-2018-9521 being exploited?

There is no known exploitation of CVE-2018-9521 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 GHSA-v7jc-crf6-wh7w.