ghsa-4wfv-x2vf-68j5
Vulnerability from github
Published
2025-05-09 09:33
Modified
2025-05-09 09:33
Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-37849"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-09T07:16:05Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-4wfv-x2vf-68j5",
  "modified": "2025-05-09T09:33:19Z",
  "published": "2025-05-09T09:33:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37849"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07476e0d932afc53c05468076393ac35d0b4999e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2480326eba8ae9ccc5e4c3c2dc8d407db68e3c52"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/250f25367b58d8c65a1b060a2dda037eea09a672"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5085e02362b9948f82fceca979b8f8e12acb1cc5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c322789613407647a05ff5c451a7bf545fb34e73"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1e9087abaeedec9bf2894a282ee4f0d8383f299"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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