CVE-2026-80888 (GCVE-0-2026-80888)
Vulnerability from cvelistv5
Published
2026-09-04 17:11
Modified
2026-09-04 17:11
Severity ?
Summary
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
Impacted products
Vendor Product Version
Linux Linux Version: 65981f7681abdf92b25942222b629b9c512d0705
Version: 65981f7681abdf92b25942222b629b9c512d0705
Version: 65981f7681abdf92b25942222b629b9c512d0705
Version: 65981f7681abdf92b25942222b629b9c512d0705
Version: 65981f7681abdf92b25942222b629b9c512d0705
Version: 65981f7681abdf92b25942222b629b9c512d0705
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vmwgfx/ttm_object.c"
          ],
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              "versionType": "semver"
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              "versionType": "original_commit_for_fix"
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          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: drop dma_buf reference on foreign-fd prime import\n\nttm_prime_fd_to_handle() returns -ENOSYS when the imported fd\u0027s\ndma_buf-\u003eops do not match the ttm_object_device\u0027s ops, but does so\nwithout releasing the reference acquired by dma_buf_get().  Any\nunprivileged renderD client passing a non-vmwgfx prime fd through the\nDRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per\ncall and indefinitely pins the foreign exporter\u0027s GEM resources.\n\nFunnel the error path through the existing dma_buf_put() so the\nreference is always dropped."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T17:11:04.975Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057"
        },
        {
          "url": "https://git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293"
        },
        {
          "url": "https://git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf"
        },
        {
          "url": "https://git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d"
        }
      ],
      "title": "drm/vmwgfx: drop dma_buf reference on foreign-fd prime import",
      "x_generator": {
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80888",
    "datePublished": "2026-09-04T17:11:04.975Z",
    "dateReserved": "2026-08-26T14:34:25.799Z",
    "dateUpdated": "2026-09-04T17:11:04.975Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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