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CVE-2026-49430 Kernel heap overflow in ZFS_IOC_RECV_NEW ioctl

🗓️ 19 Aug 2026 05:15:29Reported by freebsdType 
cvelist
 cvelist
🔗 www.cve.org👁 7 Views

ZFS_IOC_RECV_NEW truncates 64-bit payload size to 32-bit, causing kernel heap overflow in heal receive path.

Related
Affected
Refs
[
  {
    "defaultStatus": "unknown",
    "modules": [
      "zfs"
    ],
    "product": "FreeBSD",
    "vendor": "FreeBSD",
    "versions": [
      {
        "status": "affected",
        "versionType": "release",
        "version": "15.1-RELEASE",
        "lessThan": "p1"
      },
      {
        "status": "affected",
        "versionType": "release",
        "version": "15.0-RELEASE",
        "lessThan": "p11"
      },
      {
        "status": "affected",
        "versionType": "release",
        "version": "14.4-RELEASE",
        "lessThan": "p7"
      },
      {
        "status": "affected",
        "versionType": "release",
        "version": "14.3-RELEASE",
        "lessThan": "p16"
      }
    ]
  }
]

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