CVE-2025-38673

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> Revert "drm/gem-framebuffer: Use dma_buf from GEM object instance"<br /> <br /> This reverts commit cce16fcd7446dcff7480cd9d2b6417075ed81065.<br /> <br /> The dma_buf field in struct drm_gem_object is not stable over the<br /> object instance&amp;#39;s lifetime. The field becomes NULL when user space<br /> releases the final GEM handle on the buffer object. This resulted<br /> in a NULL-pointer deref.<br /> <br /> Workarounds in commit 5307dce878d4 ("drm/gem: Acquire references on<br /> GEM handles for framebuffers") and commit f6bfc9afc751 ("drm/framebuffer:<br /> Acquire internal references on GEM handles") only solved the problem<br /> partially. They especially don&amp;#39;t work for buffer objects without a DRM<br /> framebuffer associated.<br /> <br /> Hence, this revert to going back to using .import_attach-&gt;dmabuf.<br /> <br /> v3:<br /> - cc stable