CVE-2026-93789 wifi: iwlwifi: bound aligned TLV advance in FW parser
A length underflow in the iwlwifi firmware parser allows attackers to cause a denial of service via malformed TLVs.
- 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-2026-93789?
CVE-2026-93789 is a 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: bound aligned TLV advance in FW parser
Validate ALIGN(tlv_len, 4) against remaining parser length before consuming bytes from the firmware image.
This avoids length underflow on malformed TLVs.
Which versions are affected by CVE-2026-93789?
How do I fix CVE-2026-93789?
Apply the vendor's patch.
Is CVE-2026-93789 being exploited?
There is no known exploitation of CVE-2026-93789 in the wild and no public exploit code.
Sources
Also known as AZL-103868, BELL-CVE-2026-93789, DEBIAN-CVE-2026-93789, GHSA-3qxj-gg5h-r87p, UBUNTU-CVE-2026-93789.