CVE-2023-21041 Memory corruption in Android

High 7.8 Published 24 Mar 2023 Updated 25 Feb 2025

A local attacker can exploit an out-of-bounds write in the Android kernel to escalate privileges without user interaction.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2023-21041?

CVE-2023-21041 is a high-severity memory corruption vulnerability in Google Android, published on 24 Mar 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In append_to_params of param_util.c, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-250123688References: N/A

Weakness: CWE-787

Which versions are affected by CVE-2023-21041?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2023-21041?

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-2023-21041 being exploited?

There is no known exploitation of CVE-2023-21041 in the wild and no public exploit code.

All Google Android vulnerabilities

Sources

Also known as A-250123688, GHSA-r4rc-5jf7-j8p4, PUB-A-250123688.