{
  "cveId": "CVE-2026-72248",
  "url": "https://patchblox.com/security/cve/CVE-2026-72248",
  "summary": "CVE-2026-72248 is fixed in linux on 1 platform by DEBIAN-CVE-2026-72248 (version 7.1.5-1), released August 15, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  netfilter: flowtable: support IPIP tunnel with d...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  netfilter: flowtable: support IPIP tunnel with direct xmit  The combination of IPIP tunnel with direct xmit, eg. bridge device, breaks because no dst_entry is provided to check the skb headroom and to set the iph-\u003Efrag_off field. This leads to invalid dst usage and can trigger a crash in the tunnel transmit path.  Fix this by moving dst_cache and dst_cookie out of the runtime union so that they can be shared by neighbour, xfrm, and direct tunnel flows. For FLOW_OFFLOAD_XMIT_DIRECT tuples carrying tunnel metadata, preserve route state in these shared fields and release it through the common dst release path.  Since dst_entry is now available to the three supported xmit modes and dst_release() already deals with NULL dst, remove the xmit type check in nft_flow_dst_release(). Moreover, skip the check if the dst entry is NULL in nf_flow_dst_check() which is now the case for the direct xmit case.  Based on patch from Rein Wei \u003Cn05ec@lzu.edu.cn\u003E.",
  "published": "2026-08-15T06:21:52Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00553,
  "epssPercentile": 0.46434,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.5-1",
      "fix": "DEBIAN-CVE-2026-72248",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-72248",
      "released": "2026-08-15T22:38:55Z"
    }
  ],
  "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"
  }
}