FKIE_CVE-2026-63885

Vulnerability from fkie_nvd - Published: 2026-07-19 16:17 - Updated: 2026-07-20 15:16
Severity
8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/gem: fix race between change_handle and handle_delete drm_gem_change_handle_ioctl leaves the old handle live in the IDR during the window between spin_unlock(table_lock) and the final spin_lock(table_lock). A concurrent drm_gem_handle_delete on the old handle succeeds in this window, decrements handle_count to 0, and frees the GEM object while the new handle's IDR entry still references it. NULL the old handle's IDR entry before dropping table_lock so that any concurrent GEM_CLOSE on the old handle sees NULL and returns -EINVAL. Restore the old entry on the prime-bookkeeping error path.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0dfa42cfe4dbe114533480503934f43e33c1e83d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7164d78559b0ff29931a366a840a9e5dd53d4b7c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cde2c9257cbe8463b9dcf7b1075177b72b5fd938
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/drm_gem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0dfa42cfe4dbe114533480503934f43e33c1e83d",
              "status": "affected",
              "version": "672464dd53231509c9c771110798c56d4660e19e",
              "versionType": "git"
            },
            {
              "lessThan": "cde2c9257cbe8463b9dcf7b1075177b72b5fd938",
              "status": "affected",
              "version": "61bd96d3e5472c253f9c1ab77608f0c8aaa9d025",
              "versionType": "git"
            },
            {
              "lessThan": "7164d78559b0ff29931a366a840a9e5dd53d4b7c",
              "status": "affected",
              "version": "5e28b7b94408897e41c63477aabc9e1db439bc8c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/drm_gem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6.18.35",
              "status": "affected",
              "version": "6.18.32",
              "versionType": "semver"
            },
            {
              "lessThan": "7.0.12",
              "status": "affected",
              "version": "7.0.9",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gem: fix race between change_handle and handle_delete\n\ndrm_gem_change_handle_ioctl leaves the old handle live in the IDR\nduring the window between spin_unlock(table_lock) and the final\nspin_lock(table_lock). A concurrent drm_gem_handle_delete on the old\nhandle succeeds in this window, decrements handle_count to 0, and frees\nthe GEM object while the new handle\u0027s IDR entry still references it.\n\nNULL the old handle\u0027s IDR entry before dropping table_lock so that any\nconcurrent GEM_CLOSE on the old handle sees NULL and returns -EINVAL.\nRestore the old entry on the prime-bookkeeping error path."
    }
  ],
  "id": "CVE-2026-63885",
  "lastModified": "2026-07-20T15:16:53.890",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 6.0,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-07-19T16:17:05.623",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0dfa42cfe4dbe114533480503934f43e33c1e83d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7164d78559b0ff29931a366a840a9e5dd53d4b7c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cde2c9257cbe8463b9dcf7b1075177b72b5fd938"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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