CVE-2026-98765

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

USB: gadget: dummy-hcd: Fix wait for outstanding request completions

The dummy-hcd driver emulates synchronize_irq() by waiting until its

private callback_usage counter drops to 0 (with the private lock not

held). This counter is incremented whenever a gadget driver callback

occurs (which requires the private lock to be dropped), but not when a

request completion handler is called.

This is an oversight. Request completion is triggered by timer

interrupts (emulating device IRQs in a real UDC), and the interrupt

handlers are supposed to have completed when the synchronize_irq()

emulation routine returns -- they aren't supposed to be in the middle

of a completion callback. If this happens it can lead to a gadget

driver's unbind routine running before all outstanding request

completions have finished, maybe even allowing the gadget driver's

module to be unloaded while a completion handler is still running.

Fix the o

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References