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CVE-2025-38672

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: Revert "drm/gem-dma: Use dma_buf from GEM object instance" This reverts commit e8afa1557f4f963c9a511bd2c6074a941c308685.

Published Aug 22, 2025CWE-476EPSS 0.13%

Overview

CVE-2025-38672 is a medium-severity vulnerability. It was published on August 22, 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 "drm/gem-dma: Use dma_buf from GEM object instance"

This reverts commit e8afa1557f4f963c9a511bd2c6074a941c308685.

The dma_buf field in struct drm_gem_object is not stable over the

object instance's lifetime. The field becomes NULL when user space

releases the final GEM handle on the buffer object. This resulted

in a NULL-pointer deref.

Workarounds in commit 5307dce878d4 ("drm/gem: Acquire references on

GEM handles for framebuffers") and commit f6bfc9afc751 ("drm/framebuffer:

Acquire internal references on GEM handles") only solved the problem

partially. They especially don't work for buffer objects without a DRM

framebuffer associated.

Hence, this revert to going back to using .import_attach->dmabuf.

v3:

- cc stable

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/1918e79be908b8a2c8757640289bc196c14d928aRefgit.kernel.org/stable/c/e7bdb3104a2f71ec1439d37f8e6e2f201dbcd7cf

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38672?

CVE-2025-38672 is a medium-severity vulnerability. It was published on August 22, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-38672?

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-2025-38672?

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-2025-38672?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38672 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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