CVE-2025-37849 (GCVE-0-2025-37849)
Vulnerability from cvelistv5
Published
2025-05-09 06:41
Modified
2025-05-26 05:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Tear down vGIC on failed vCPU creation If kvm_arch_vcpu_create() fails to share the vCPU page with the hypervisor, we propagate the error back to the ioctl but leave the vGIC vCPU data initialised. Note only does this leak the corresponding memory when the vCPU is destroyed but it can also lead to use-after-free if the redistributor device handling tries to walk into the vCPU. Add the missing cleanup to kvm_arch_vcpu_create(), ensuring that the vGIC vCPU structures are destroyed on error.
References
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/arm.c"
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              "version": "6.14.3",
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Tear down vGIC on failed vCPU creation\n\nIf kvm_arch_vcpu_create() fails to share the vCPU page with the\nhypervisor, we propagate the error back to the ioctl but leave the\nvGIC vCPU data initialised. Note only does this leak the corresponding\nmemory when the vCPU is destroyed but it can also lead to use-after-free\nif the redistributor device handling tries to walk into the vCPU.\n\nAdd the missing cleanup to kvm_arch_vcpu_create(), ensuring that the\nvGIC vCPU structures are destroyed on error."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:22:14.682Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/c322789613407647a05ff5c451a7bf545fb34e73"
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        {
          "url": "https://git.kernel.org/stable/c/f1e9087abaeedec9bf2894a282ee4f0d8383f299"
        },
        {
          "url": "https://git.kernel.org/stable/c/250f25367b58d8c65a1b060a2dda037eea09a672"
        }
      ],
      "title": "KVM: arm64: Tear down vGIC on failed vCPU creation",
      "x_generator": {
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37849",
    "datePublished": "2025-05-09T06:41:56.874Z",
    "dateReserved": "2025-04-16T04:51:23.954Z",
    "dateUpdated": "2025-05-26T05:22:14.682Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37849\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-09T07:16:05.760\",\"lastModified\":\"2025-05-12T17:32:52.810\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nKVM: arm64: Tear down vGIC on failed vCPU creation\\n\\nIf kvm_arch_vcpu_create() fails to share the vCPU page with the\\nhypervisor, we propagate the error back to the ioctl but leave the\\nvGIC vCPU data initialised. Note only does this leak the corresponding\\nmemory when the vCPU is destroyed but it can also lead to use-after-free\\nif the redistributor device handling tries to walk into the vCPU.\\n\\nAdd the missing cleanup to kvm_arch_vcpu_create(), ensuring that the\\nvGIC vCPU structures are destroyed on error.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: arm64: Desactivaci\u00f3n de vGIC al crear una vCPU fallida. Si kvm_arch_vcpu_create() no comparte la p\u00e1gina de vCPU con el hipervisor, propagamos el error a ioctl, pero dejamos los datos de vCPU de vGIC inicializados. Cabe destacar que esto solo filtra la memoria correspondiente cuando se destruye la vCPU, sino que tambi\u00e9n puede provocar un uso despu\u00e9s de la liberaci\u00f3n si el dispositivo redistribuidor intenta acceder a la vCPU. Agregue la limpieza faltante a kvm_arch_vcpu_create() para garantizar que las estructuras de vCPU de vGIC se destruyan en caso de error.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/07476e0d932afc53c05468076393ac35d0b4999e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2480326eba8ae9ccc5e4c3c2dc8d407db68e3c52\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/250f25367b58d8c65a1b060a2dda037eea09a672\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5085e02362b9948f82fceca979b8f8e12acb1cc5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c322789613407647a05ff5c451a7bf545fb34e73\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1e9087abaeedec9bf2894a282ee4f0d8383f299\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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