CVE-2026-64335
Received Received - Intake

USB Serial Digi Acceleport Throttle Handling Flaw

Publication date: 2026-07-25

Last updated on: 2026-07-25

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: USB: serial: digi_acceleport: 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.

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Meta Information

Published
2026-07-25
Last Modified
2026-07-25
Generated
2026-07-25
AI Q&A
2026-07-25
EPSS Evaluated
N/A
NVD
CVE-2026-64335
EUVD
EUVD-2026-48879

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability affects the Linux kernel's USB serial driver for Digi AccelePort devices. When a port is closed while throttled, the read operation fails to restart, causing the port to stop receiving data until the device is reconnected or the driver is rebound.

Detection Guidance

This vulnerability affects the Linux kernel's USB serial driver for Digi AccelePort devices. Detection requires checking kernel logs for USB-related errors or disconnections during throttling events. Monitor dmesg or journalctl for messages about USB serial devices failing to receive data after throttling.

Impact Analysis

If you use a Digi AccelePort USB serial device, this flaw could disrupt data communication when the port is closed unexpectedly. You may experience loss of incoming data until the device is reconnected or the driver is reset.

Mitigation Strategies

Apply the Linux kernel patch that resolves this issue. Reboot the system to load the updated kernel. If immediate patching is not possible, avoid closing ports while throttled or unplugging the device during active use.

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