VDB-301677 · CVE-2025-21882 · Nessus 240805

Linux Kernel up to 6.13.5 mlx5 memory leak

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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.13.5. It has been classified as problematic. This affects an unknown part of the component mlx5. Performing a manipulation results in an unknown weakness. This vulnerability is reported as CVE-2025-21882. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.13.5. It has been classified as problematic. This affects an unknown code block of the component mlx5. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix vport QoS cleanup on error When enabling vport QoS fails, the scheduling node was never freed, causing a leak. Add the missing free and reset the vport scheduling node pointer to NULL.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-21882 since 12/29/2024. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 240805 (SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2025:01951-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.13.6 eliminates this vulnerability. Applying the patch fead368502bce0e10bea7c0d2895b2fa0c6c10aa/7f3528f7d2f98b70e19a6bb7b130fc82c079ac54 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 (240805) and CERT Bund (WID-SEC-2025-0649). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

Google Container-Optimized OS
Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
SUSE openSUSE
Dell Avamar
Open Source Linux Kernel
SolarWinds Security Event Manager
Dell NetWorker
Dell Secure Connect Gateway

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: 5.4

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

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 240805
Nessus Name: SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2025:01951-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.13.6
Patch: fead368502bce0e10bea7c0d2895b2fa0c6c10aa/7f3528f7d2f98b70e19a6bb7b130fc82c079ac54

Timelineinfo

12/29/2024 🔍
03/27/2025 +88 days 🔍
03/27/2025 +0 days 🔍
12/07/2025 +255 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21882 (🔍)
GCVE (CVE): GCVE-0-2025-21882
GCVE (VulDB): GCVE-100-301677
CERT Bund: WID-SEC-2025-0649 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 03/27/2025 16:28
Updated: 12/07/2025 16:22
Changes: 03/27/2025 16:28 (56), 06/28/2025 02:28 (2), 08/25/2025 04:48 (7), 10/29/2025 20:07 (13), 12/07/2025 16:22 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.