CVE-2021-39804 Null dereference in Android

What is CVE-2021-39804?

CVE-2021-39804 is a medium-severity vulnerability in Google Android, published on 12 Apr 2022. 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 reinit of HeifDecoderImpl.cpp, there is a possible crash due to a missing null check. This could lead to remote persistent denial of service in the file picker with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-11 Android-12 Android-12LAndroid ID: A-215002587

Weakness: CWE-476

Which versions are affected by CVE-2021-39804?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-39804?

Apply the vendor's patch.

Is CVE-2021-39804 being exploited?

There is no known exploitation of CVE-2021-39804 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-215002587, ASB-A-215002587, GHSA-w72v-vg94-fwxx.