Linux Kernel up to 6.17.3 pidfs privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.17.3. This affects an unknown part of the component pidfs. The manipulation results in an unknown weakness. This vulnerability is cataloged as CVE-2025-40217. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.17.3. Affected is an unknown functionality of the component pidfs. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: pidfs: validate extensible ioctls Validate extensible ioctls stricter than we do now.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2025-40217 since 04/16/2025. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/23/2026).

The vulnerability scanner Nessus provides a plugin with the ID 277478 (Linux Distros Unpatched Vulnerability : CVE-2025-40217), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.17.4 eliminates this vulnerability. Applying the patch bf0fbf5e8b0aff8a4a0fb35e32b10083baa83c04/3c17001b21b9f168c957ced9384abe969019b609 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 (277478), EUVD (EUVD-2025-201186) and CERT Bund (WID-SEC-2025-2747). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • Google Cloud Platform
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • Microsoft Azure Linux

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

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

CVSSv2info

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

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 277478
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-40217

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.17.4
Patch: bf0fbf5e8b0aff8a4a0fb35e32b10083baa83c04/3c17001b21b9f168c957ced9384abe969019b609

Timelineinfo

04/16/2025 CVE reserved
12/04/2025 +232 days Advisory disclosed
12/04/2025 +0 days VulDB entry created
02/23/2026 +81 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40217 (🔒)
GCVE (CVE): GCVE-0-2025-40217
GCVE (VulDB): GCVE-100-334314
EUVD: 🔒
CERT Bund: WID-SEC-2025-2747 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 12/04/2025 17:38
Updated: 02/23/2026 09:27
Changes: 12/04/2025 17:38 (57), 12/06/2025 06:50 (1), 12/07/2025 00:24 (2), 01/05/2026 00:31 (7), 02/23/2026 09:27 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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