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CVE-2025-22037

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference in alloc_preauth_hash() The Client send malformed smb2 negotiate request.

Published Apr 16, 2025CWE-476EPSS 69.51%

Overview

CVE-2025-22037 is a high-severity vulnerability. It was published on April 16, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

ksmbd: fix null pointer dereference in alloc_preauth_hash()

The Client send malformed smb2 negotiate request. ksmbd return error

response. Subsequently, the client can send smb2 session setup even

thought conn->preauth_info is not allocated.

This patch add KSMBD_SESS_NEED_SETUP status of connection to ignore

session setup request if smb2 negotiate phase is not complete.

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/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4dRefgit.kernel.org/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335Refgit.kernel.org/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780Refgit.kernel.org/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5adRefgit.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6Refwww.zerodayinitiative.com/advisories/ZDI-25-310/

How CyberStrike helps

Frequently asked questions

What is CVE-2025-22037?

CVE-2025-22037 is a high-severity vulnerability. It was published on April 16, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-22037?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-22037?

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-2025-22037?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-22037 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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