CVE-2026-64342

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USB: iowarrior Use-After-Free on Disconnect

Publication date: 2026-07-25

Last updated on: 2026-08-11

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: USB: iowarrior: fix use-after-free on disconnect Submitted write URBs are not stopped on close() and therefore need to be stopped unconditionally on disconnect() to avoid use-after-free in the completion handler.

CVSS Scores

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Meta Information

Published

2026-07-25

Last Modified

2026-08-11

Generated

2026-08-14

AI Q&A

2026-07-25

EPSS Evaluated

2026-08-13

NVD

CVE-2026-64342

EUVD

EUVD-2026-48886

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a use-after-free vulnerability in the Linux kernel's USB iowarrior driver. When a USB device using this driver is disconnected, submitted write operations (URBs) are not properly stopped, which can lead to a use-after-free error in the completion handler when the device is disconnected.

Detection Guidance

This vulnerability is specific to the Linux kernel's USB iowarrior driver and is triggered by USB device disconnects. Detection requires checking for use-after-free errors in kernel logs or monitoring USB device driver behavior. Commands like dmesg | grep -i iowarrior or journalctl -k | grep -i use-after-free may help identify issues.

Impact Analysis

This vulnerability could cause system instability or crashes if a USB device using the iowarrior driver is disconnected while write operations are still pending. It may lead to kernel panics or unexpected behavior in affected systems.

Compliance Impact

This vulnerability does not directly affect compliance with standards like GDPR or HIPAA as it is a low-level kernel issue related to USB device handling. Compliance impacts would depend on how the affected system is used in a broader context, not the vulnerability itself.

Mitigation Strategies

Apply the latest Linux kernel update that includes the fix for this vulnerability. If immediate patching is not possible, consider disabling the iowarrior USB driver module (rmmod iowarrior) to prevent exploitation until a patch is applied.

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