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

usb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stop

cc_debounce_dwork is queued from the set_cc() and start_toggling()
callbacks, which run from TCPM's kthread worker. port_stop() returns
before tcpm_unregister_port() destroys that worker. Flushing the worker
during unregister may therefore run a callback which queues the delayed
work after port_stop() has returned.

The delayed work can then run after devres has freed pmic_typec_port.

Use disable_delayed_work_sync() in port_stop() to cancel a pending
instance and prevent the TCPM callbacks from queueing another one.

This issue was found by an in-house static analysis tool.
Published: 2026-09-16
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: Use‑After‑Free in USB Type‑C PMI driver
Action: Immediate Patch
AI Analysis

Impact

A use‑after‑free flaw exists in the Linux USB Type‑C PMI driver: when a port is stopped, delayed work can be queued after the port resource has been freed, allowing the work to execute on invalid kernel memory. This can corrupt kernel memory and potentially lead to kernel‑level code execution.

Affected Systems

The vulnerability affects Linux kernel builds that include the qcom‑pmic‑typec USB Type‑C driver. Version information is not specified, so any affected build prior to the patch may be at risk. The specific kernel releases and patches that mitigate the issue are not publicly listed at this time.

Risk and Exploitability

The CVSS score of 7.8 indicates a high severity flaw. Because the EPSS score is below 1 % and the vulnerability is not listed in CISA’s KEV catalog, the probability of exploitation is low at present. Based on the description, it is inferred that an attacker would need to initiate a USB device interaction before the driver stops to trigger the delayed work path. Local attackers who can control USB devices may exploit this dangling pointer, potentially achieving privilege escalation to kernel mode.

Generated by OpenCVE AI on September 18, 2026 at 08:27 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the kernel update that disables cc_debounce_dwork during port stop (the patch referenced in the commit logs).
  • Rebuild or update the kernel ensuring that the qcom‑pmic‑typec driver is included only if required; otherwise, consider disabling or removing the driver to eliminate the attack surface.
  • Consider disabling or unplugging USB Type‑C ports or drivers on systems that do not require them as a temporary measure.

Generated by OpenCVE AI on September 18, 2026 at 08:27 UTC.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4817-1 linux-6.12 security update
Debian DSA Debian DSA DSA-6528-1 linux security update
History

Fri, 18 Sep 2026 08:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Wed, 16 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


Wed, 16 Sep 2026 10:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: usb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stop cc_debounce_dwork is queued from the set_cc() and start_toggling() callbacks, which run from TCPM's kthread worker. port_stop() returns before tcpm_unregister_port() destroys that worker. Flushing the worker during unregister may therefore run a callback which queues the delayed work after port_stop() has returned. The delayed work can then run after devres has freed pmic_typec_port. Use disable_delayed_work_sync() in port_stop() to cancel a pending instance and prevent the TCPM callbacks from queueing another one. This issue was found by an in-house static analysis tool.
Title usb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stop
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-09-16T14:41:43.363Z

Reserved: 2026-09-11T19:38:34.782Z

Link: CVE-2026-90027

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-16T11:17:15.723

Modified: 2026-09-16T15:18:26.043

Link: CVE-2026-90027

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-18T08:30:06Z

Weaknesses