CVE-2026-46271 wifi: ath12k: do WoW offloads only on primary link
A flaw in the ath12k WiFi driver causes firmware crashes during multi-link connections, leading to denial of service for affected Linux systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46271?
CVE-2026-46271 is a high-severity denial of service vulnerability in Linux kernel, published on 3 Jun 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: ath12k: do WoW offloads only on primary link
In case of multi-link connection, WCN7850 firmware crashes due to WoW offloads enabled on both primary and secondary links.
Change to do it only on primary link to fix it.
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00284-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1
Weakness: CWE-667
Which versions are affected by CVE-2026-46271?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46271?
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-2026-46271 being exploited?
There is no known exploitation of CVE-2026-46271 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-46271, DEBIAN-CVE-2026-46271, GHSA-288x-m8hv-hv43, UBUNTU-CVE-2026-46271.