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CVE-2025-37952

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix UAF in __close_file_table_ids A use-after-free is possible if one thread destroys the file via __ksmbd_close_fd whil…

Published May 20, 2025CWE-416EPSS 0.37%

Overview

CVE-2025-37952 is a high-severity vulnerability. It was published on May 20, 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 UAF in __close_file_table_ids

A use-after-free is possible if one thread destroys the file

via __ksmbd_close_fd while another thread holds a reference to

it. The existing checks on fp->refcount are not sufficient to

prevent this.

The fix takes ft->lock around the section which removes the

file from the file table. This prevents two threads acquiring the

same file pointer via __close_file_table_ids, as well as the other

functions which retrieve a file from the IDR and which already use

this same lock.

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/16727e442568a46d9cca69fe2595896de86e120dRefgit.kernel.org/stable/c/36991c1ccde2d5a521577c448ffe07fcccfe104dRefgit.kernel.org/stable/c/9e9841e232b51171ddf3bc4ee517d5d28dc8cad6Refgit.kernel.org/stable/c/fec1f9e9a650e8e7011330a085c77e7bf2a08ea9

How CyberStrike helps

Frequently asked questions

What is CVE-2025-37952?

CVE-2025-37952 is a high-severity vulnerability. It was published on May 20, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-37952?

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-2025-37952?

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-2025-37952?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-37952 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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