CVE-2026-20462 Memory corruption in MediaTek chipset
A heap buffer overflow in MediaTek Telephony 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
- None listed
What is CVE-2026-20462?
CVE-2026-20462 is a medium-severity memory corruption vulnerability in MediaTek, Inc. MediaTek chipset, published on 1 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In Telephony, there is a possible memory corruption due to a heap buffer overflow. 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: ALPS11006447; Issue ID: MSV-7871.
Weakness: CWE-122
Which versions are affected by CVE-2026-20462?
How do I fix CVE-2026-20462?
No fix has been published for CVE-2026-20462 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-2026-20462 being exploited?
There is no known exploitation of CVE-2026-20462 in the wild and no public exploit code.
Sources
Also known as GHSA-39rh-f5c6-gchq.