drm/tests: shmem: Hold reservation lock around madvise

{
  "id": "2f499cec365e265c4e2e335d28655bf5e97b3e530b638d82ac912516ac7ca85f",
  "url": "https://osv.dev/vulnerability/CVE-2025-71298",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/tests: shmem: Hold reservation lock around madvise",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/tests: shmem: Hold reservation lock around madvise Acquire and release the GEM object's reservation lock around calls to the object's madvide operation. The tests use drm_gem_shmem_madvise_locked(), which led to errors such as show below. [ 58.339389] WARNING: CPU: 1 PID: 1352 at drivers/gpu/drm/drm_gem_shmem_helper.c:499 drm_gem_shmem_madvise_locked+0xde/0x140 Only export the new helper drm_gem_shmem_madvise() for Kunit tests. This is not an interface for regular drivers.",
    "evidence": "osv:CVE-2025-71298",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.18.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.6",
            "evidence": "/affected/1/ranges"
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    "severity": "unknown",
    "structured": {
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      "aliases": [
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                {
                  "fixed": "07cfcab370da06f26c273306571cbb0bfa3b9c52"
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          "ranges": [
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              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.16.0"
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                  "fixed": "6.18.16"
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              ]
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            {
              "type": "ECOSYSTEM",
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            "ecosystem": "Linux"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-71298.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.150939318Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/07cfcab370da06f26c273306571cbb0bfa3b9c52",
        "https://git.kernel.org/stable/c/607d07d8cc0b835a8701259f08a03dc149b79b4f",
        "https://git.kernel.org/stable/c/9cc77691b5fd615625955cedf726da57543088f1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71298.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-71298",
        "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/2025/71xxx/CVE-2025-71298.json"
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    "related_cves": [
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        "value": "CVE-2025-71298",
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    "security_relevant": true,
    "severity_evidence": null
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  "source_id": "core-osv",
  "document_id": 490343,
  "published_at": "2026-05-08T13:11:09.797+00:00"
}