drm/vmwgfx: drop dma_buf reference on foreign-fd prime import
Summary
| CVE | CVE-2026-80888 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-04 18:17:56 UTC |
| Updated | 2026-09-04 18:17:56 UTC |
| 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. |
Risk And Classification
EPSS: 0.001730000 probability, percentile 0.068830000 (date 2026-09-07)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 65981f7681abdf92b25942222b629b9c512d0705 619c3cfa88e09603a13d918f754808db2dda7057 git | Not specified |
| CNA | Linux | Linux | affected 65981f7681abdf92b25942222b629b9c512d0705 c1c22fca0a0896a452a7cb92422d67babd65b4be git | Not specified |
| CNA | Linux | Linux | affected 65981f7681abdf92b25942222b629b9c512d0705 a1e972fa94c3a8069e022c67b9d97c7aa7b05293 git | Not specified |
| CNA | Linux | Linux | affected 65981f7681abdf92b25942222b629b9c512d0705 a8434b145b1e467940334c58c00af241e9494c5f git | Not specified |
| CNA | Linux | Linux | affected 65981f7681abdf92b25942222b629b9c512d0705 4df39eb99bb47d1f24d1952c23b21b10988356bf git | Not specified |
| CNA | Linux | Linux | affected 65981f7681abdf92b25942222b629b9c512d0705 f739416dc555fa205a785e5135d73fa39b26f35d git | Not specified |
| CNA | Linux | Linux | affected 3.13 | Not specified |
| CNA | Linux | Linux | unaffected 3.13 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.183 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.151 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.103 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.44 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.8 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.