CVE-2026-20418 Memory corruption in MediaTek chipset
A missing bounds check in MediaTek chipsets allows remote attackers to escalate privileges via an out-of-bounds write without user interaction.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20418?
CVE-2026-20418 is a critical memory corruption vulnerability in MediaTek, Inc. MediaTek chipset, published on 2 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Thread, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465153; Issue ID: MSV-4927.
Weakness: CWE-787
Which versions are affected by CVE-2026-20418?
It affects 1 product.
Products include Google Matter.
How do I fix CVE-2026-20418?
No fix has been published for CVE-2026-20418 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-2026-20418 being exploited?
There is no known exploitation of CVE-2026-20418 in the wild and no public exploit code.
Sources
Also known as GHSA-6chv-75w7-xwj6.