CVE-2026-74441

Technical Description

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

usb: typec: ucsi: Fix race condition and ordering in port unregistration

A synchronization issue exists during port unregistration where pending

partner work items can race against workqueue destruction, leading to

use-after-free conditions:

cros_ec_ucsi cros_ec_ucsi.3.auto: error -ETIMEDOUT: PPM init failed

BUG: kernel NULL pointer dereference, address: 0000000000000000

RIP: 0010:__queue_work+0x83/0x4a0

Call Trace:

<IRQ>

__cfi_delayed_work_timer_fn+0x10/0x10

run_timer_softirq+0x3b6/0xbd0

sched_clock_cpu+0xc/0x110

irq_exit_rcu+0x18d/0x330

fred_sysvec_apic_timer_interrupt+0x5e/0x80

Fix this by ensuring strict ordering and proper serialization during

teardown:

1. Move ucsi_unregister_partner() to the beginning of the teardown

sequence and protect it under the connector mutex lock.

2. Ensure all pending partner tasks are explicitly flushed and finished

before the workqueue is destroyed

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