{
  "cveId": "CVE-2026-31472",
  "url": "https://patchblox.com/security/cve/CVE-2026-31472",
  "summary": "CVE-2026-31472 is fixed in linux on 1 platform by DEBIAN-CVE-2026-31472 (version 6.19.11-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  xfrm: iptfs: validate inner IPv4 header length i...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  xfrm: iptfs: validate inner IPv4 header length in IPTFS payload  Add validation of the inner IPv4 packet tot_len and ihl fields parsed from decrypted IPTFS payloads in __input_process_payload(). A crafted ESP packet containing an inner IPv4 header with tot_len=0 causes an infinite loop: iplen=0 leads to capturelen=min(0, remaining)=0, so the data offset never advances and the while(data \u003C tail) loop never terminates, spinning forever in softirq context.  Reject inner IPv4 packets where tot_len \u003C ihl*4 or ihl*4 \u003C sizeof(struct iphdr), which catches both the tot_len=0 case and malformed ihl values. The normal IP stack performs this validation in ip_rcv_core(), but IPTFS extracts and processes inner packets before they reach that layer.",
  "published": "2026-04-22T14:16:43Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00121,
  "epssPercentile": 0.01885,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.19.11-1",
      "fix": "DEBIAN-CVE-2026-31472",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-31472",
      "released": "2026-05-15T16:01:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}