CVE-2026-64335: USB: serial: digi_acceleport: fix broken rx after throttle
In the Linux kernel, the following vulnerability has been resolved:
USB: serial: digiacceleport: fix broken rx after throttle
If the port is closed while throttled, the read urb is never resubmitted and the port will not receive any further data until the device is reconnected (or the driver is rebound).
Clear the throttle flags and submit the urb if needed when opening the port.
Affected Software
Remediation
Event History
Frequently Asked Questions
Which systems are exposed to this issue?
Systems running the Linux kernel with the digi_acceleport USB serial driver in use are exposed when a port can be throttled and subsequently closed.
What condition triggers the loss of received data?
The condition occurs when a throttled port is closed. The read URB is then not resubmitted when the port is opened again, preventing further received data.
What can be done if the patch cannot be applied immediately?
Reconnect the device or rebind the driver to restore reception. Avoid closing a port while it is throttled where possible.