drm/tests: shmem: Hold reservation lock around purge

{
  "id": "5437aa2c5970f333791fc2a5443581f376f2982fc68b304bfa5f152e89f2ab9c",
  "url": "https://osv.dev/vulnerability/CVE-2025-71296",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/tests: shmem: Hold reservation lock around purge",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/tests: shmem: Hold reservation lock around purge Acquire and release the GEM object's reservation lock around calls to the object's purge operation. The tests use drm_gem_shmem_purge_locked(), which led to errors such as show below. [ 58.709128] WARNING: CPU: 1 PID: 1354 at drivers/gpu/drm/drm_gem_shmem_helper.c:515 drm_gem_shmem_purge_locked+0x51c/0x740 Only export the new helper drm_gem_shmem_purge() for Kunit tests. This is not an interface for regular drivers.",
    "evidence": "osv:CVE-2025-71296",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.18.16",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.19.6",
            "evidence": "/affected/1/ranges"
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        "affected_versions": []
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    "severity": "unknown",
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      "aliases": [
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                {
                  "fixed": "8baeee2c1c0cdb3a8eac3b8f38156cce6ee1a69f"
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          "database_specific": {
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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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              "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-2025-71296.json"
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        }
      ],
      "modified": "2026-10-28T02:30:49.432155722Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3f41307d589c2f25d556d47b165df808124cd0c4",
        "https://git.kernel.org/stable/c/8baeee2c1c0cdb3a8eac3b8f38156cce6ee1a69f",
        "https://git.kernel.org/stable/c/cdf8bbbd9017adcfb91ad9a902198d4b507719a9",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71296.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-71296",
        "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-2025-71296.json"
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    "security_relevant": true,
    "severity_evidence": null
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  "source_id": "core-osv",
  "document_id": 517736,
  "published_at": "2026-05-08T13:11:08.251+00:00"
}