Linux Kernel up to 6.6.121/6.12.66/6.18.6/6.19-rc5 dmaengine allocation of resources

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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 6.6.121/6.12.66/6.18.6/6.19-rc5. Impacted is an unknown function of the component dmaengine. Executing a manipulation can lead to allocation of resources. This vulnerability is tracked as CVE-2025-71186. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.6.121/6.12.66/6.18.6/6.19-rc5. This vulnerability affects an unknown part of the component dmaengine. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: dmaengine: stm32: dmamux: fix device leak on route allocation Make sure to drop the reference taken when looking up the DMA mux platform device during route allocation. Note that holding a reference to a device does not prevent its driver data from going away so there is no point in keeping the reference.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2025-71186 since 01/31/2026. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 297486 (Linux Distros Unpatched Vulnerability : CVE-2025-71186), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.122, 6.12.67, 6.18.7 or 6.19-rc6 eliminates this vulnerability. Applying the patch 1a179ac01ff3993ab97e33cc77c316ed7415cda1/2fb10259d4efb4367787b5ae9c94192e8a91c648/3ef52d31cce8ba816739085a61efe07b63c6cf27/dd6e4943889fb354efa3f700e42739da9bddb6ef 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 (297486), EUVD (EUVD-2025-206589) and CERT Bund (WID-SEC-2026-0280). Once again VulDB remains the best source for vulnerability data.

Affected

  • Open Source Linux Kernel

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
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: 297486
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-71186

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.122/6.12.67/6.18.7/6.19-rc6
Patch: 1a179ac01ff3993ab97e33cc77c316ed7415cda1/2fb10259d4efb4367787b5ae9c94192e8a91c648/3ef52d31cce8ba816739085a61efe07b63c6cf27/dd6e4943889fb354efa3f700e42739da9bddb6ef

Timelineinfo

01/31/2026 Advisory disclosed
01/31/2026 +0 days CVE reserved
01/31/2026 +0 days VulDB entry created
03/26/2026 +54 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-71186 (🔒)
GCVE (CVE): GCVE-0-2025-71186
GCVE (VulDB): GCVE-100-343612
EUVD: 🔒
CERT Bund: WID-SEC-2026-0280 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 01/31/2026 15:22
Updated: 03/26/2026 01:17
Changes: 01/31/2026 15:22 (58), 02/01/2026 01:18 (1), 02/01/2026 03:51 (2), 02/02/2026 16:08 (7), 03/26/2026 01:17 (11)
Complete: 🔍
Cache ID: 216::103

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