{
  "cveId": "CVE-2026-46655",
  "url": "https://patchblox.com/security/cve/CVE-2026-46655",
  "summary": "CVE-2026-46655 is fixed in virtio-win on 1 platform by RHBA-2026:65134 (version 1.9.58-0.el10_0), released June 16, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "virtio-win: virtio-win provides Windows paravirtualized drivers for QEMU and KVM",
  "description": "virtio-win provides Windows paravirtualized drivers for QEMU and KVM. From mm210 until mm320, the Viosock driver permits a low-privilege local process to submit an IOCTL_SELECT request with attacker-controlled VIRTIO_VSOCK_SELECT.Fdss[*].fd_count values that overflow the 32-bit sum used by VIOSockSelect for bounds checking. The wrapped sum can pass the FD_SETSIZE check even though an individual descriptor count is much larger than the expected limit. VIOSockSelectCopyFds then iterates using the unchecked count and writes beyond the allocated pPkt-\u003EFds array in the NonPagedPool kernel heap. Successful exploitation can corrupt kernel memory and enable privilege escalation in a Windows guest running the driver. This issue is fixed in mm320.",
  "published": "2026-06-16T00:00:00Z",
  "severity": "important",
  "cvss": 7.8,
  "epss": 0.00175,
  "epssPercentile": 0.07045,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "virtio-win",
      "release": "RHEL 10",
      "fixedVersion": "1.9.58-0.el10_0",
      "fix": "RHBA-2026:65134",
      "url": "https://patchblox.com/security/fix/linux/rhba-2026-65134",
      "released": "2026-06-16T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}