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FKIE_CVE-2026-80888

Vulnerability from fkie_nvd - Published: 2026-09-04 18:17 - Updated: 2026-09-04 18:17
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vmwgfx/ttm_object.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "619c3cfa88e09603a13d918f754808db2dda7057",
              "status": "affected",
              "version": "65981f7681abdf92b25942222b629b9c512d0705",
              "versionType": "git"
            },
            {
              "lessThan": "c1c22fca0a0896a452a7cb92422d67babd65b4be",
              "status": "affected",
              "version": "65981f7681abdf92b25942222b629b9c512d0705",
              "versionType": "git"
            },
            {
              "lessThan": "a1e972fa94c3a8069e022c67b9d97c7aa7b05293",
              "status": "affected",
              "version": "65981f7681abdf92b25942222b629b9c512d0705",
              "versionType": "git"
            },
            {
              "lessThan": "a8434b145b1e467940334c58c00af241e9494c5f",
              "status": "affected",
              "version": "65981f7681abdf92b25942222b629b9c512d0705",
              "versionType": "git"
            },
            {
              "lessThan": "4df39eb99bb47d1f24d1952c23b21b10988356bf",
              "status": "affected",
              "version": "65981f7681abdf92b25942222b629b9c512d0705",
              "versionType": "git"
            },
            {
              "lessThan": "f739416dc555fa205a785e5135d73fa39b26f35d",
              "status": "affected",
              "version": "65981f7681abdf92b25942222b629b9c512d0705",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vmwgfx/ttm_object.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.13"
            },
            {
              "lessThan": "3.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-80888",
  "lastModified": "2026-09-04T18:17:56.787",
  "metrics": {},
  "published": "2026-09-04T18:17:56.787",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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