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CVE-2025-21975

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: handle errors in mlx5_chains_create_table() In mlx5_chains_create_table(), the return value of mlx5_get_fdb_sub_ns()…

Published Apr 1, 2025CWE-476EPSS 0.19%

Overview

CVE-2025-21975 is a medium-severity vulnerability. It was published on April 1, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: handle errors in mlx5_chains_create_table()

In mlx5_chains_create_table(), the return value of mlx5_get_fdb_sub_ns()

and mlx5_get_flow_namespace() must be checked to prevent NULL pointer

dereferences. If either function fails, the function should log error

message with mlx5_core_warn() and return error pointer.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/093b4aaec97ec048623e3fe1e516fc45a954d412Refgit.kernel.org/stable/c/1598307c914ba3d2642a2b03d1ff11efbdb7c6c2Refgit.kernel.org/stable/c/15bdd93728369b2c8942a8e5d549d4b5dc04a2d9Refgit.kernel.org/stable/c/1d34296409a519b4027750e3e82d9e19553a7398Refgit.kernel.org/stable/c/29c419c64e9b396baeda1d8713d2aa3ba7c0acf6Refgit.kernel.org/stable/c/637105ef0d46fe5beac15aceb431da3ec832bb00Refgit.kernel.org/stable/c/eab0396353be1c778eba1c0b5180176f04dd21ceReflists.debian.org/debian-lts-announce/2025/05/msg00030.htmlReflists.debian.org/debian-lts-announce/2025/05/msg00045.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-21975?

CVE-2025-21975 is a medium-severity vulnerability. It was published on April 1, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-21975?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-21975?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-21975?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-21975 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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