CVE-2026-90352 wifi: mt76: mt7915: release hif2 reference on probe IRQ failure
A resource leak in the mt7915 WiFi driver can lead to denial of service if IRQ setup fails during device probing.
- 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-2026-90352?
CVE-2026-90352 is a denial of service vulnerability in Linux, published on 17 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: mt76: mt7915: release hif2 reference on probe IRQ failure
The hif2 reference obtained by mt7915_pci_init_hif2() is only released on error paths that key off dev->hif2, which is not assigned until after the IRQ setup. If pci_alloc_irq_vectors() or the primary devm_request_irq() fails, the reference leaks. Drop it explicitly on those paths via mt7915_put_hif2().
Which versions are affected by CVE-2026-90352?
How do I fix CVE-2026-90352?
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-2026-90352 being exploited?
There is no known exploitation of CVE-2026-90352 in the wild and no public exploit code.
Sources
Also known as AZL-102047, BELL-CVE-2026-90352, DEBIAN-CVE-2026-90352, GHSA-cqhq-7whc-695x, UBUNTU-CVE-2026-90352.