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CVE-2025-22039

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix overflow in dacloffset bounds check The dacloffset field was originally typed as int and used in an unchecked additi…

Published Apr 16, 2025CWE-125EPSS 0.79%

Overview

CVE-2025-22039 is a high-severity vulnerability. It was published on April 16, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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

ksmbd: fix overflow in dacloffset bounds check

The dacloffset field was originally typed as int and used in an

unchecked addition, which could overflow and bypass the existing

bounds check in both smb_check_perm_dacl() and smb_inherit_dacl().

This could result in out-of-bounds memory access and a kernel crash

when dereferencing the DACL pointer.

This patch converts dacloffset to unsigned int and uses

check_add_overflow() to validate access to the DACL.

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/443b373a4df5a2cb9f7b8c4658b2afedeb16397fRefgit.kernel.org/stable/c/6a9cd9ff0fa2bcc30b2bfb8bdb161eb20e44b9dcRefgit.kernel.org/stable/c/6b8d379048b168a0dff5ab1acb975b933f368514Refgit.kernel.org/stable/c/beff0bc9d69bc8e733f9bca28e2d3df5b3e10e42

How CyberStrike helps

Frequently asked questions

What is CVE-2025-22039?

CVE-2025-22039 is a high-severity vulnerability. It was published on April 16, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-22039?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-22039?

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-2025-22039?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-22039 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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