CVE-2026-20447 Memory corruption in MediaTek chipset
A missing bounds check in MediaTek chipset firmware allows local privilege escalation for attackers with System privileges.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-20447?
CVE-2026-20447 is a medium-severity memory corruption vulnerability in MediaTek, Inc. MediaTek chipset, published on 4 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In geniezone, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10724073; Issue ID: MSV-6296.
Weakness: CWE-125
Which versions are affected by CVE-2026-20447?
It affects 17 products.
Products include Mediatek Mt6768 Firmware, Mediatek Mt6789 Firmware, Mediatek Mt6877 Firmware, Mediatek Mt6899 Firmware, Mediatek Mt6989 Firmware, Mediatek Mt6991 Firmware and 11 more.
How do I fix CVE-2026-20447?
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-2026-20447 being exploited?
There is no known exploitation of CVE-2026-20447 in the wild and no public exploit code.
Sources
Also known as A-488940382, ASB-A-488940382, GHSA-5hp2-c33h-x595, M-ALPS10724073.