VDB-297755 · CVE-2025-21769 · Nessus 250084

Linux Kernel up to 6.13.3/6.14-rc2 vmclock_miscdev_fops privilege escalation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.13.3/6.14-rc2 and classified as problematic. The impacted element is the function vmclock_miscdev_fops. The manipulation leads to an unknown weakness. This vulnerability is referenced as CVE-2025-21769. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.13.3/6.14-rc2. It has been rated as problematic. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ptp: vmclock: Add .owner to vmclock_miscdev_fops Without the .owner field, the module can be unloaded while /dev/vmclock0 is open, leading to an oops.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2025-21769 since 12/29/2024. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 250084 (Linux Distros Unpatched Vulnerability : CVE-2025-21769), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.13.4 or 6.14-rc3 eliminates this vulnerability. Applying the patch 3b5709225b43ee33e1026dd1fc0949a7f19b5289/7b07b040257c1b658ef3eca86e4b6ae02d65069c 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 (250084) and CERT Bund (WID-SEC-2025-0453). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

Google Container-Optimized OS
Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
Siemens SIMATIC S7
RESF Rocky Linux
Dell NetWorker
Dell Avamar
Red Hat OpenShift
IBM QRadar SIEM
SolarWinds Security Event Manager
Dell PowerProtect Data Domain
Open Source Linux Kernel
IBM DataPower Gateway
Dell Secure Connect Gateway
Dell PowerScale OneFS
Dell ECS

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

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

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 250084
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-21769

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.13.4/6.14-rc3
Patch: 3b5709225b43ee33e1026dd1fc0949a7f19b5289/7b07b040257c1b658ef3eca86e4b6ae02d65069c

Timelineinfo

12/29/2024 🔍
02/27/2025 +60 days 🔍
02/27/2025 +0 days 🔍
05/25/2026 +452 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21769 (🔍)
GCVE (CVE): GCVE-0-2025-21769
GCVE (VulDB): GCVE-100-297755
CERT Bund: WID-SEC-2025-0453 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 02/27/2025 08:56
Updated: 05/25/2026 11:53
Changes: 02/27/2025 08:56 (56), 08/17/2025 13:44 (2), 10/26/2025 01:47 (7), 11/10/2025 05:08 (1), 01/18/2026 10:29 (1), 05/25/2026 11:53 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.