CVE-2026-53107
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
In the Linux kernel libertas driver, usb_kill_urb() is called from interrupt context, which can cause synchronization issues. Instead, the driver now checks for pending URBs.
Risk Assessment
The organization may experience Wi-Fi data transmission issues, including potential deadlocks or errors when the function is called from interrupt context.
Recommendation
Apply the patch that replaces usb_kill_urb() with a check of the tx_submitted anchor and returns -EBUSY.
Original NVD description (English source)
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.