Skip to content
CVE PROGRAM SOURCE RECORDUnscored

CVE-2025-38669

Revert "drm/gem-shmem: Use dma_buf from GEM object instance"

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: Revert "drm/gem-shmem: Use dma_buf from GEM object instance" This reverts commit 1a148af06000e545e714fe3210af3d77ff903c11. 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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 1a148af06000e545e714fe3210af3d77ff903c11 to < 291a77604858a8b47cf6640a12b76e97f99e00edaffected
  • 1a148af06000e545e714fe3210af3d77ff903c11 to < 6d496e9569983a0d7a05be6661126d0702cf94f7affected

Linux Linux

Default version status: affected

  • 6.15affected
  • 0 to < 6.15unaffected
  • 6.15.9 to ≤ 6.15.*unaffected
  • 6.16 to ≤ *unaffected

References