CVE-2025-38674

Revert "drm/prime: Use dma_buf from GEM object instance"

Description

In the Linux kernel, the following vulnerability has been resolved: Revert "drm/prime: Use dma_buf from GEM object instance" This reverts commit f83a9b8c7fd0557b0c50784bfdc1bbe9140c9bf8. 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

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/5f05d83ce689a8930a70dfa73f879604aef8cc03
https://git.kernel.org/stable/c/fb4ef4a52b79a22ad382bfe77332642d02aef773

Frequently Asked Questions

What is the severity of CVE-2025-38674?: CVE-2025-38674 has not yet been assigned a CVSS score.
How to fix CVE-2025-38674?: To fix CVE-2025-38674, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-38674 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-38674 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-38674?: CVE-2025-38674 affects Linux Linux, Linux Linux.

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