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CVE-2025-39734

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: Revert "fs/ntfs3: Replace inode_trylock with inode_lock" This reverts commit 69505fe98f198ee813898cbcaf6770949636430b.

Published Sep 7, 2025EPSS 0.15%

Overview

CVE-2025-39734 is a medium-severity vulnerability. It was published on September 7, 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:

Revert "fs/ntfs3: Replace inode_trylock with inode_lock"

This reverts commit 69505fe98f198ee813898cbcaf6770949636430b.

Initially, conditional lock acquisition was removed to fix an xfstest bug

that was observed during internal testing. The deadlock reported by syzbot

is resolved by reintroducing conditional acquisition. The xfstest bug no

longer occurs on kernel version 6.16-rc1 during internal testing. I

assume that changes in other modules may have contributed to this.

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/1903a6c1f2818154f6bc87bceaaecafa92b6ac5cRefgit.kernel.org/stable/c/7ce6f83ca9d52c9245b7a017466fc4baa1241b0bRefgit.kernel.org/stable/c/a49f0abd8959048af18c6c690b065eb0d65b2d21Refgit.kernel.org/stable/c/a936be9b5f51c4d23f66fb673e9068c6b08104a4Refgit.kernel.org/stable/c/b356ee013a79e7e3147bfe065de376706c5d2ee9Refgit.kernel.org/stable/c/bd20733746263acaaf2a21881665db27ee4303d5Refgit.kernel.org/stable/c/bec8109f957a6e193e52d1728799994c8005ca83Reflists.debian.org/debian-lts-announce/2025/10/msg00008.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-39734?

CVE-2025-39734 is a medium-severity vulnerability. It was published on September 7, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-39734?

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-2025-39734?

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-2025-39734?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-39734 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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