CVE-2026-74326 wifi: mt76: mt7921: fix resource leak in probe error path
A resource leak in the mt7921 WiFi driver probe error path allows local attackers to cause denial of service by exhausting system resources.
- 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-2026-74326?
CVE-2026-74326 is a denial of service vulnerability in Linux, published on 15 Aug 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: mt7921: fix resource leak in probe error path
When pcim_iomap_region() or devm_kmemdup() fail, the code returns directly without cleaning up previously allocated resources: - mt76_device allocated by mt76_alloc_device() - pci irq vectors allocated by pci_alloc_irq_vectors() Fix this by jumping to the existing error cleanup path instead of returning directly.
Which versions are affected by CVE-2026-74326?
How do I fix CVE-2026-74326?
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-2026-74326 being exploited?
There is no known exploitation of CVE-2026-74326 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-74326, GHSA-7ww8-3pm8-2f5m, UBUNTU-CVE-2026-74326.