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CVE-2025-71079

5.5 · MEDIUM
Published Jan 13, 2026 linux CWE-667

Overview

CVE-2025-71079 is a medium-severity vulnerability affecting linux linux_kernel. It was published on January 13, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical Description

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

net: nfc: fix deadlock between nfc_unregister_device and rfkill_fop_write

A deadlock can occur between nfc_unregister_device() and rfkill_fop_write()

due to lock ordering inversion between device_lock and rfkill_global_mutex.

The problematic lock order is:

Thread A (rfkill_fop_write):

rfkill_fop_write()

mutex_lock(&rfkill_global_mutex)

rfkill_set_block()

nfc_rfkill_set_block()

nfc_dev_down()

device_lock(&dev->dev) <- waits for device_lock

Thread B (nfc_unregister_device):

nfc_unregister_device()

device_lock(&dev->dev)

rfkill_unregister()

mutex_lock(&rfkill_global_mutex) <- waits for rfkill_global_mutex

This creates a classic ABBA deadlock scenario.

Fix this by moving rfkill_unregister() and rfkill_destroy() outside the

device_lock critical section. Store the rfkill pointer in a local variable

before releasing the lock, then call rfkill_unregister(

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

Vendor Product Versions Status
linux linux_kernel >= 4.4.293, < 4.5 Affected

References

Ref git.kernel.org/stable/c/1ab526d97a57e44d26fadcc0e9adeb9c0c0182f5 Ref git.kernel.org/stable/c/2e0831e9fc46a06daa6d4d8d57a2738e343130c3 Ref git.kernel.org/stable/c/6b93c8ab6f6cda8818983a4ae3fcf84b023037b4 Ref git.kernel.org/stable/c/8fc4632fb508432895430cd02b38086bdd649083 Ref git.kernel.org/stable/c/e02a1c33f10a0ed3aba855ab8ae2b6c4c5be8012 Ref git.kernel.org/stable/c/ee41f4f3ccf8cd6ba3732e867abbec7e6d8d12e5 Ref git.kernel.org/stable/c/f3a8a7c1aa278f2378b2f3a10500c6674dffdfda Ref cert-portal.siemens.com/productcert/html/ssa-019113.html

Frequently Asked Questions

What is CVE-2025-71079?

CVE-2025-71079 is a medium-severity vulnerability affecting linux linux_kernel. It was published on January 13, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-71079?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-71079?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

How can CyberStrike help with CVE-2025-71079?

CyberStrike's AI-powered security agents can automatically detect CVE-2025-71079 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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