CVE-2026-93799 wifi: iwlwifi: mvm: validate sta_id in BA window status notif
An out-of-bounds write in the iwlwifi driver allows attackers to cause denial of service or execute code via malformed firmware notifications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93799?
CVE-2026-93799 is a high-severity memory corruption vulnerability in Linux, published on 24 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: iwlwifi: mvm: validate sta_id in BA window status notif
BA_WINDOW_STATUS_NOTIFICATION_ID extracts a 5-bit sta_id from the firmware notification and uses it to index fw_id_to_mac_id[] without bounds checking. Validate sta_id before array access to prevent out-of-bounds indexing.
Which versions are affected by CVE-2026-93799?
How do I fix CVE-2026-93799?
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-2026-93799 being exploited?
There is no known exploitation of CVE-2026-93799 in the wild and no public exploit code.
Sources
Also known as AZL-103616, BELL-CVE-2026-93799, DEBIAN-CVE-2026-93799, GHSA-537c-46r9-4j6g, UBUNTU-CVE-2026-93799.