Skip to main content
VulnerabilityPublished Updated

CVE-2026-31509: Linux kernel · nfc: nci: fix circular locking dependency in nci_close_device

Affects Linux kernelSource GCVE Database

0
Compare

Not known to be exploited · patch available : update Linux kernel when convenient.

Data as of 12 Nov 2026, 03:35 UTC

Severity
Low

Rated Low by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
Patch
Available

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

AI-suggested

A patch is available and has been applied to fix the circular locking dependency by changing the order of operations in nci_close_device. Users should update to the fixed Linux kernel version. Since this is a kernel-level fix, the vendor manages remediation for the cloud-hosted service if applicable.

Description

A circular locking dependency vulnerability was identified and fixed in the Linux kernel's NFC subsystem, specifically in the nci_close_device function. The issue involved flushing workqueues while holding a mutex lock, which could cause deadlocks. The fix moves the flushing operation after releasing the lock to prevent this condition. This bug was observed during self-testing but no exploitation in the wild is known.

References

Community reviews

Loading reviews…