VDB-298869 · CVE-2025-21833 · EUVD-2025-6212

Linux Kernel up to 6.13.2 WARN_ON_ONCE null pointer dereference

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.
5.5	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 6.13.2. Affected is the function WARN_ON_ONCE. Performing a manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2025-21833. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.13.2. It has been classified as critical. This affects the function WARN_ON_ONCE. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid use of NULL after WARN_ON_ONCE There is a WARN_ON_ONCE to catch an unlikely situation when domain_remove_dev_pasid can't find the `pasid`. In case it nevertheless happens we must avoid using a NULL pointer.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-21833 since 12/29/2024. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 232261 (Linux Distros Unpatched Vulnerability : CVE-2025-21833), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.13.3 or 6.14-rc1 eliminates this vulnerability. Applying the patch df96876be3b064aefc493f760e0639765d13ed0d/60f030f7418d3f1d94f2fb207fe3080e1844630b 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 (232261), EUVD (EUVD-2025-6212) and CERT Bund (WID-SEC-2025-0499). 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
RESF Rocky Linux
SolarWinds Security Event Manager
Open Source Linux Kernel
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: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / 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
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 232261
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-21833

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.13.3/6.14-rc1
Patch: df96876be3b064aefc493f760e0639765d13ed0d/60f030f7418d3f1d94f2fb207fe3080e1844630b

Timelineinfo

12/29/2024 🔍
03/06/2025 +67 days 🔍
03/06/2025 +0 days 🔍
02/16/2026 +347 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21833 (🔍)
GCVE (CVE): GCVE-0-2025-21833
GCVE (VulDB): GCVE-100-298869
EUVD: 🔍
CERT Bund: WID-SEC-2025-0499 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 03/06/2025 18:22
Updated: 02/16/2026 21:59
Changes: 03/06/2025 18:22 (58), 03/07/2025 14:43 (2), 11/02/2025 15:25 (11), 11/02/2025 16:15 (1), 02/16/2026 21:59 (7)
Complete: 🔍
Cache ID: 216::103

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