CVE-2026-93790 wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
An out-of-bounds write in the iwlwifi driver could corrupt memory, though currently harmless due to unused features, requiring a kernel patch.
- 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-2026-93790?
CVE-2026-93790 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: fix out-of-bounds tid_data access in BA notif
mvmsta->tid_data was indexed by the TFD loop counter 'i' instead of the actual TID value 'tid'. This writes lq_color into a random tid_data slot unrelated to the BA entry. Since multi-TID blockack is not really in use, 'i' was always 0 and no harm was done. Add a out-of-bound check before accessing the array.
Which versions are affected by CVE-2026-93790?
How do I fix CVE-2026-93790?
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-2026-93790 being exploited?
There is no known exploitation of CVE-2026-93790 in the wild and no public exploit code.
Sources
Also known as AZL-103802, BELL-CVE-2026-93790, DEBIAN-CVE-2026-93790, GHSA-rh32-7cxx-qxq4, UBUNTU-CVE-2026-93790.