CVE-2025-21978 (GCVE-0-2025-21978)
Vulnerability from cvelistv5
Published
2025-04-01 15:47
Modified
2025-05-04 07:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/hyperv: Fix address space leak when Hyper-V DRM device is removed When a Hyper-V DRM device is probed, the driver allocates MMIO space for the vram, and maps it cacheable. If the device removed, or in the error path for device probing, the MMIO space is released but no unmap is done. Consequently the kernel address space for the mapping is leaked. Fix this by adding iounmap() calls in the device removal path, and in the error path during device probing.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/158242b56bf465a73e1edeac0fe828a8acad4499
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/24f1bbfb2be77dad82489c1468bbb14312aab129
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad27b4a51495490b815580d9b935e8eee14d1a9c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aed709355fd05ef747e1af24a1d5d78cd7feb81e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c40cd24bfb9bfbb315c118ca14ebe6cf52e2dd1e
Impacted products
Vendor Product Version
Linux Linux Version: a0ab5abced550ddeefddb06055ed60779a54eb79
Version: a0ab5abced550ddeefddb06055ed60779a54eb79
Version: a0ab5abced550ddeefddb06055ed60779a54eb79
Version: a0ab5abced550ddeefddb06055ed60779a54eb79
Version: a0ab5abced550ddeefddb06055ed60779a54eb79
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   Linux Linux Version: 6.0
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/hyperv/hyperv_drm_drv.c"
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          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "version": "6.1.132",
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              "version": "6.12.20",
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              "version": "6.13.8",
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            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/hyperv: Fix address space leak when Hyper-V DRM device is removed\n\nWhen a Hyper-V DRM device is probed, the driver allocates MMIO space for\nthe vram, and maps it cacheable. If the device removed, or in the error\npath for device probing, the MMIO space is released but no unmap is done.\nConsequently the kernel address space for the mapping is leaked.\n\nFix this by adding iounmap() calls in the device removal path, and in the\nerror path during device probing."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:26:27.998Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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        },
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/aed709355fd05ef747e1af24a1d5d78cd7feb81e"
        }
      ],
      "title": "drm/hyperv: Fix address space leak when Hyper-V DRM device is removed",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21978",
    "datePublished": "2025-04-01T15:47:08.168Z",
    "dateReserved": "2024-12-29T08:45:45.798Z",
    "dateUpdated": "2025-05-04T07:26:27.998Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21978\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-01T16:15:29.183\",\"lastModified\":\"2025-04-01T20:26:01.990\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/hyperv: Fix address space leak when Hyper-V DRM device is removed\\n\\nWhen a Hyper-V DRM device is probed, the driver allocates MMIO space for\\nthe vram, and maps it cacheable. If the device removed, or in the error\\npath for device probing, the MMIO space is released but no unmap is done.\\nConsequently the kernel address space for the mapping is leaked.\\n\\nFix this by adding iounmap() calls in the device removal path, and in the\\nerror path during device probing.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/158242b56bf465a73e1edeac0fe828a8acad4499\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/24f1bbfb2be77dad82489c1468bbb14312aab129\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ad27b4a51495490b815580d9b935e8eee14d1a9c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aed709355fd05ef747e1af24a1d5d78cd7feb81e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c40cd24bfb9bfbb315c118ca14ebe6cf52e2dd1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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