drm/amdgpu: NULL-check BO's backing store when determining GFX12 PTE flags

{
  "id": "233a8df49f43f902ec37fd661ddf2a0a9338ffda736618ed0b10bbee7cb5f159",
  "url": "https://osv.dev/vulnerability/CVE-2025-21990",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/amdgpu: NULL-check BO's backing store when determining GFX12 PTE flags",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: NULL-check BO's backing store when determining GFX12 PTE flags PRT BOs may not have any backing store, so bo->tbo.resource will be NULL. Check for that before dereferencing. (cherry picked from commit 3e3fcd29b505cebed659311337ea03b7698767fc)",
    "evidence": "osv:CVE-2025-21990",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.20",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-21990",
      "aliases": [
        "CVE-2025-21990"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "fixed": "72235808eabea93055b459a63443bd9cd6b08aa4"
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                {
                  "fixed": "af23e39b9e9280b1f6299b6f2fa090a1694240ad"
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                {
                  "fixed": "6cc30748e17ea2a64051ceaf83a8372484e597f1"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21990.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.11.0"
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                {
                  "fixed": "6.12.20"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.8"
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21990.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.111116247Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/6cc30748e17ea2a64051ceaf83a8372484e597f1",
        "https://git.kernel.org/stable/c/72235808eabea93055b459a63443bd9cd6b08aa4",
        "https://git.kernel.org/stable/c/af23e39b9e9280b1f6299b6f2fa090a1694240ad",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21990.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21990",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21990.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21990",
        "evidence": "/id"
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    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518185,
  "published_at": "2025-04-02T12:53:13.59+00:00"
}