CVE-2026-93791 wifi: iwlwifi: mvm: add a check on the tid coming from the firmware
An attacker with proximity can trigger memory corruption in the Linux kernel iwlwifi driver by sending crafted firmware notifications, potentially causing a crash or code execution.
- 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-2026-93791?
CVE-2026-93791 is a 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: add a check on the tid coming from the firmware
ba_notif->tid is a firmware-controlled u8 that is used directly as an array index into tid_data[] without any validation. Add a bounds check against IWL_MAX_TID_COUNT before dereferencing the array.
Which versions are affected by CVE-2026-93791?
How do I fix CVE-2026-93791?
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-2026-93791 being exploited?
There is no known exploitation of CVE-2026-93791 in the wild and no public exploit code.
Sources
Also known as AZL-103577, BELL-CVE-2026-93791, DEBIAN-CVE-2026-93791, GHSA-6m6g-gjgc-588p, UBUNTU-CVE-2026-93791.