CVE-2026-80888 (GCVE-0-2026-80888)

Vulnerability from cvelistv5 – Published: 2026-09-04 17:11 – Updated: 2026-09-14 11:58
VLAI
Title
drm/vmwgfx: drop dma_buf reference on foreign-fd prime import
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 65981f7681abdf92b25942222b629b9c512d0705 , < 1715901e7052cf90fbf04c8303e563a47e021278 (git)
Affected: 65981f7681abdf92b25942222b629b9c512d0705 , < c4fd91ee7228f56fbb4cf528757dc17ffefeb0ee (git)
Affected: 65981f7681abdf92b25942222b629b9c512d0705 , < 619c3cfa88e09603a13d918f754808db2dda7057 (git)
Affected: 65981f7681abdf92b25942222b629b9c512d0705 , < c1c22fca0a0896a452a7cb92422d67babd65b4be (git)
Affected: 65981f7681abdf92b25942222b629b9c512d0705 , < a1e972fa94c3a8069e022c67b9d97c7aa7b05293 (git)
Affected: 65981f7681abdf92b25942222b629b9c512d0705 , < a8434b145b1e467940334c58c00af241e9494c5f (git)
Affected: 65981f7681abdf92b25942222b629b9c512d0705 , < 4df39eb99bb47d1f24d1952c23b21b10988356bf (git)
Affected: 65981f7681abdf92b25942222b629b9c512d0705 , < f739416dc555fa205a785e5135d73fa39b26f35d (git)
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Linux Linux Affected: 3.13
Unaffected: 0 , < 3.13 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "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."
        }
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    "dateReserved": "2026-08-26T14:34:25.799Z",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
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    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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