CVE-2026-31509
Description
A flaw was found in the Linux kernel, specifically within the Near Field Communication (NFC) NCI subsystem. A circular locking dependency can occur when the nci_close_device() function attempts to flush work queues while holding a lock that can be re-acquired by a work queue function. This improper handling of locks can lead to a system hang, resulting in a denial of service (DoS).
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Other); DoS: Crash, Exit, or Restart
Each thread of execution will "hang" and prevent tasks from completing. In some cases, CPU consumption may occur if a lock check occurs in a tight loop.
Frequently Asked Questions
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