CVE-2026-20471 Memory corruption in MediaTek chipset
A missing bounds check in MediaTek chipset firmware allows local attackers with physical access to cause a denial of service via out-of-bounds write.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20471?
CVE-2026-20471 is a medium-severity memory corruption vulnerability in MediaTek, Inc. MediaTek chipset, published on 3 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In DA, there is a possible out of bounds write due to a missing bounds check. This could lead to local denial of service, if an attacker has physical access to the device, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS10991588 (Note: For MT6880, MT6890, MT6990, MT6988, MT6986, MT6813) / AUTO00851171 (Note: For MT2735, MT2737); Issue ID: MSV-7790.
Weakness: CWE-787
Which versions are affected by CVE-2026-20471?
How do I fix CVE-2026-20471?
No fix has been published for CVE-2026-20471 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-20471 being exploited?
There is no known exploitation of CVE-2026-20471 in the wild and no public exploit code.
Sources
Also known as GHSA-w9g5-vfpg-gh63.