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CVE-2025-21802

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: hns3: fix oops when unload drivers paralleling When unload hclge driver, it tries to disable sriov first for each ae_dev n…

Published Feb 27, 2025EPSS 0.21%

Overview

CVE-2025-21802 is a medium-severity vulnerability. It was published on February 27, 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: hns3: fix oops when unload drivers paralleling

When unload hclge driver, it tries to disable sriov first for each

ae_dev node from hnae3_ae_dev_list. If user unloads hns3 driver at

the time, because it removes all the ae_dev nodes, and it may cause

oops.

But we can't simply use hnae3_common_lock for this. Because in the

process flow of pci_disable_sriov(), it will trigger the remove flow

of VF, which will also take hnae3_common_lock.

To fixes it, introduce a new mutex to protect the unload process.

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/622d92a67656e5c4d2d6ccac02d688ed995418c6Refgit.kernel.org/stable/c/82736bb83fb0221319c85c2e9917d0189cd84e1eRefgit.kernel.org/stable/c/8c640dd3d900cc8988a39c007591f1deee776df4Refgit.kernel.org/stable/c/92e5995773774a3e70257e9c95ea03518268bea5Refgit.kernel.org/stable/c/b5a8bc47aa0a4aa8bca5466dfa2d12dbb5b3cd0cRefgit.kernel.org/stable/c/cafe9a27e22736d4a01b3933e36225f9857c7988Refgit.kernel.org/stable/c/e876522659012ef2e73834a0b9f1cbe3f74d5fadReflists.debian.org/debian-lts-announce/2025/03/msg00028.htmlReflists.debian.org/debian-lts-announce/2025/05/msg00030.htmlRefcert-portal.siemens.com/productcert/html/ssa-019113.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-21802?

CVE-2025-21802 is a medium-severity vulnerability. It was published on February 27, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-21802?

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-2025-21802?

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-2025-21802?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-21802 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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