CVE-2026-98159 wifi: mt76: mt7921: validate CLC firmware records
A missing bounds check in the mt7921 WiFi driver allows a malicious firmware image to cause memory corruption, potentially leading to code execution or system crashes.
- 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-2026-98159?
CVE-2026-98159 is a medium-severity memory corruption vulnerability in Linux kernel, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7921: validate CLC firmware records
The CLC region is supplied by firmware, but the loader trusts the region count and each record length. A malformed image can make the region table pointer precede the firmware buffer, make the record loop fail to advance, or index phy->clc past its end. Validate the table and record bounds before dereferencing or copying.
Weakness: CWE-787
Which versions are affected by CVE-2026-98159?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-98159?
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-2026-98159 being exploited?
There is no known exploitation of CVE-2026-98159 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-104703, BELL-CVE-2026-98159, DEBIAN-CVE-2026-98159, GHSA-hc5w-crxq-xmg4, UBUNTU-CVE-2026-98159.