drm/vmwgfx: drop dma_buf reference on foreign-fd prime import
ttm_prime_fd_to_handle() returns -ENOSYS when the imported fd's
dma_buf->ops do not match the ttm_object_device's ops, but does so
without releasing the reference acquired by dma_buf_get(). Any
unprivileged renderD client passing a non-vmwgfx prime fd through the
DRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per
call and indefinitely pins the foreign exporter's GEM resources.
Funnel the error path through the existing dma_buf_put() so the
reference is always dropped.
Metrics
Affected Vendors & Products
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Solution
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Workaround
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Fri, 04 Sep 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-772 |
Fri, 04 Sep 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: drop dma_buf reference on foreign-fd prime import ttm_prime_fd_to_handle() returns -ENOSYS when the imported fd's dma_buf->ops do not match the ttm_object_device's ops, but does so without releasing the reference acquired by dma_buf_get(). Any unprivileged renderD client passing a non-vmwgfx prime fd through the DRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per call and indefinitely pins the foreign exporter's GEM resources. Funnel the error path through the existing dma_buf_put() so the reference is always dropped. | |
| Title | drm/vmwgfx: drop dma_buf reference on foreign-fd prime import | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
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Projects
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MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-09-04T17:11:04.975Z
Reserved: 2026-08-26T14:34:25.799Z
Link: CVE-2026-80888
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-04T18:17:56.787
Modified: 2026-09-04T18:17:56.787
Link: CVE-2026-80888
Redhat
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OpenCVE Enrichment
Updated: 2026-09-04T20:00:07Z