CVE-2026-80888 is a vulnerability in Linux Kernel
Published on September 4, 2026
drm/vmwgfx: drop dma_buf reference on foreign-fd prime import
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.
Products Associated with CVE-2026-80888
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Affected Versions
Linux:- Version 65981f7681abdf92b25942222b629b9c512d0705 and below 619c3cfa88e09603a13d918f754808db2dda7057 is affected.
- Version 65981f7681abdf92b25942222b629b9c512d0705 and below c1c22fca0a0896a452a7cb92422d67babd65b4be is affected.
- Version 65981f7681abdf92b25942222b629b9c512d0705 and below a1e972fa94c3a8069e022c67b9d97c7aa7b05293 is affected.
- Version 65981f7681abdf92b25942222b629b9c512d0705 and below a8434b145b1e467940334c58c00af241e9494c5f is affected.
- Version 65981f7681abdf92b25942222b629b9c512d0705 and below 4df39eb99bb47d1f24d1952c23b21b10988356bf is affected.
- Version 65981f7681abdf92b25942222b629b9c512d0705 and below f739416dc555fa205a785e5135d73fa39b26f35d is affected.
- Version 3.13 is affected.
- Before 3.13 is unaffected.
- Version 6.1.183, <= 6.1.* is unaffected.
- Version 6.6.151, <= 6.6.* is unaffected.
- Version 6.12.103, <= 6.12.* is unaffected.
- Version 6.18.44, <= 6.18.* is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.