CVE-2026-98191
Received Received - Intake

WiFi Runtime PM Reference Leak in Linux Kernel

Publication date: 2026-10-06

Last updated on: 2026-10-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: wifi: wlcore: release runtime PM ref on regdomain config failure wlcore_regdomain_config() gets a runtime PM reference before sending the regulatory-domain command. When wlcore_cmd_regdomain_config_locked() fails, the function queues recovery and returns without dropping that reference. Release the reference after handling the command result so both success and failure paths balance the preceding pm_runtime_resume_and_get(). The recovery worker takes a separate runtime PM reference and cannot release the reference held here.

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Meta Information

Published
2026-10-06
Last Modified
2026-10-06
Generated
2026-10-06
AI Q&A
2026-10-06
EPSS Evaluated
N/A
NVD
CVE-2026-98191
EUVD
EUVD-2026-93119

Affected Vendors & Products

Showing 9 associated CPEs
Vendor Product Version / Range
Linux Linux fa2648a34e73fb7a17fd0a82e0335a9451d8f5c8
Linux Linux fa2648a34e73fb7a17fd0a82e0335a9451d8f5c8
Linux Linux fa2648a34e73fb7a17fd0a82e0335a9451d8f5c8
Linux Linux fa2648a34e73fb7a17fd0a82e0335a9451d8f5c8
Linux Linux fa2648a34e73fb7a17fd0a82e0335a9451d8f5c8
Linux Linux fa2648a34e73fb7a17fd0a82e0335a9451d8f5c8
Linux Linux fa2648a34e73fb7a17fd0a82e0335a9451d8f5c8
Linux Linux fa2648a34e73fb7a17fd0a82e0335a9451d8f5c8
Linux Linux 4.19

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves a missing runtime power management (PM) reference release in the wlcore Wi-Fi driver. When configuring the regulatory domain fails, the function wlcore_regdomain_config() does not drop a runtime PM reference it acquired before sending the command. This can lead to unbalanced PM references.

Detection Guidance

This vulnerability is specific to the Linux kernel's wlcore WiFi driver and may not have direct detection commands. Check kernel logs for wlcore-related errors or failures using dmesg | grep wlcore or journalctl -k | grep wlcore. Ensure your kernel is updated to a patched version.

Impact Analysis

This issue may cause system instability or unexpected power management behavior on devices using the wlcore Wi-Fi driver. It could lead to excessive power consumption or improper device state management, potentially affecting system performance or battery life.

Mitigation Strategies

Update your Linux kernel to the latest stable version that includes the fix for CVE-2026-98191. Reboot the system to apply the update. Monitor system logs for any wlcore-related issues after the update.

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