Linux Kernel up to 6.16.9 spi reference count

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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 6.16.9. This impacts an unknown function of the component spi. The manipulation results in reference count. This vulnerability is reported as CVE-2025-40005. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.16.9. Affected is an unknown part of the component spi. The manipulation with an unknown input leads to a reference count vulnerability. CWE is classifying the issue as CWE-911. The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: spi: cadence-quadspi: Implement refcount to handle unbind during busy driver support indirect read and indirect write operation with assumption no force device removal(unbind) operation. However force device removal(removal) is still available to root superuser. Unbinding driver during operation causes kernel crash. This changes ensure driver able to handle such operation for indirect read and indirect write by implementing refcount to track attached devices to the controller and gracefully wait and until attached devices remove operation completed before proceed with removal operation.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2025-40005 since 04/16/2025. The exploitability is told to be difficult. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 271672 (Linux Distros Unpatched Vulnerability : CVE-2025-40005), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.16.10 eliminates this vulnerability. Applying the patch b7ec8a2b094a33d0464958c2cbf75b8f229098b0/7446284023e8ef694fb392348185349c773eefb3 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (271672) and CERT Bund (WID-SEC-2025-2350). Once again VulDB remains the best source for vulnerability data.

Affected

  • Debian Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel

Productinfo

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Reference count
CWE: CWE-911 / CWE-664
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 271672
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-40005

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.16.10
Patch: b7ec8a2b094a33d0464958c2cbf75b8f229098b0/7446284023e8ef694fb392348185349c773eefb3

Timelineinfo

04/16/2025 CVE reserved
10/20/2025 +187 days Advisory disclosed
10/20/2025 +0 days VulDB entry created
02/26/2026 +129 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40005 (🔒)
GCVE (CVE): GCVE-0-2025-40005
GCVE (VulDB): GCVE-100-329052
CERT Bund: WID-SEC-2025-2350 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/20/2025 22:19
Updated: 02/26/2026 17:00
Changes: 10/20/2025 22:19 (58), 10/27/2025 19:53 (2), 02/12/2026 16:56 (7), 02/26/2026 17:00 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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