CVE-2026-53107 wifi: libertas: don't kill URBs in interrupt context
A race condition in the Linux libertas Wi-Fi driver causes a crash when USB requests are killed in interrupt context, leading to denial of service.
- 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-2026-53107?
CVE-2026-53107 is a medium-severity vulnerability in Linux kernel, published on 24 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: libertas: don't kill URBs in interrupt context
Serialization for the TX path was enforced by calling usb_kill_urb()/usb_kill_anchored_urbs(), to prevent transmission before a previous URB was completed. usb_tx_block() can be called from interrupt context (e.g. in the HCD giveback path), so we can't always use it to kill in-flight URBs.
Prevent sleeping during interrupt context by checking the tx_submitted anchor for existing URBs. We now return -EBUSY, to indicate there's a pending request.
Which versions are affected by CVE-2026-53107?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53107?
Apply the vendor's patch.
Is CVE-2026-53107 being exploited?
There is no known exploitation of CVE-2026-53107 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-90713, BELL-CVE-2026-53107, DEBIAN-CVE-2026-53107, GHSA-2h5x-857c-q5qg, ROOT-OS-DEBIAN-11-CVE-2026-53107, ROOT-OS-DEBIAN-12-CVE-2026-53107 and 4 more.