Vulnerability 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.
References
- https://git.kernel.org/stable/c/1715901e7052cf90fbf04c8303e563a47e021278
- https://git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf
- https://git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057
- https://git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293
- https://git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f
- https://git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be
- https://git.kernel.org/stable/c/c4fd91ee7228f56fbb4cf528757dc17ffefeb0ee
- https://git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d
FAQ
What is CVE-2026-80888?
CVE-2026-80888 is a documented vulnerability. 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_...
How severe is CVE-2026-80888?
CVSS scoring is not yet available for CVE-2026-80888. Check NVD for updates.
Is there a patch for CVE-2026-80888?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.