CVE-2023-21209 Deserialization in Android

What is CVE-2023-21209?

CVE-2023-21209 is a medium-severity unsafe deserialization vulnerability in Google Android, published on 28 Jun 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In multiple functions of sta_iface.cpp, there is a possible out of bounds read due to unsafe deserialization. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-262236273

Weakness: CWE-502

Which versions are affected by CVE-2023-21209?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2023-21209?

Apply the vendor's patch.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2023-21209 being exploited?

There is no known exploitation of CVE-2023-21209 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-262236273, GHSA-945v-52hm-cr68, PUB-A-262236273.