CVE-2026-55266 Memory corruption in Android

High 7.8 Published 5 Oct 2026 Updated 6 Oct 2026

A local attacker can exploit an out-of-bounds write in the Android kernel's qsort function 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-2026-55266?

CVE-2026-55266 is a high-severity memory corruption vulnerability in Google Android, published on 5 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In qsort of libufdt_sysdeps_vendor.c, there is a possible out-of-bounds write due to resource exhaustion. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

Weakness: CWE-400

Which versions are affected by CVE-2026-55266?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2026-55266?

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-2026-55266 being exploited?

There is no known exploitation of CVE-2026-55266 in the wild and no public exploit code.

All Google Android vulnerabilities

Sources

Also known as A-509980995, ASB-A-509980995, GHSA-jg96-rqrj-v9p3.