CVE-2026-98328 wifi: mac80211: add HE 6 GHz capability in the scan elems len
A missing length calculation for HE 6 GHz capabilities in Linux kernel Wi-Fi scanning can cause a kernel warning and potential denial of service.
- 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-2026-98328?
CVE-2026-98328 is a denial of service vulnerability in Linux, published on 6 Oct 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: mac80211: add HE 6 GHz capability in the scan elems len
The HE 6 GHz Band Capability element is in the probe request for every band if 6 GHz is supported, so add the size to scan_ies_len.
Otherwise, building probe request elements can fail, triggering the WARN_ON in __ieee80211_start_scan().
Which versions are affected by CVE-2026-98328?
How do I fix CVE-2026-98328?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-98328 being exploited?
There is no known exploitation of CVE-2026-98328 in the wild and no public exploit code.
Sources
Also known as AZL-106434, BELL-CVE-2026-98328, DEBIAN-CVE-2026-98328, GHSA-hvjp-xxq4-q29j, UBUNTU-CVE-2026-98328.