{
  "cveId": "CVE-2026-53363",
  "url": "https://patchblox.com/security/cve/CVE-2026-53363",
  "summary": "CVE-2026-53363 is fixed in linux on 1 platform by DEBIAN-CVE-2026-53363 (version 7.0.13-1), released July 10, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  xfrm: iptfs: preserve shared-frag marker in iptf...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  xfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags()  iptfs_consume_frags() transfers paged fragments from one socket buffer to another but fails to propagate the SKBFL_SHARED_FRAG flag. This is the same class of bug that was fixed in skb_try_coalesce() for CVE-2026-46300: when fragments backed by read-only page-cache pages are merged, the marker indicating their shared nature must be preserved so that ESP can decide correctly whether in-place encryption is safe.  Apply the same two-line fix used in skb_try_coalesce() to iptfs_consume_frags().",
  "published": "2026-07-10T12:17:22Z",
  "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": 0.00411,
  "epssPercentile": 0.3565,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.0.13-1",
      "fix": "DEBIAN-CVE-2026-53363",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-53363",
      "released": "2026-07-10T15:54:09Z"
    }
  ],
  "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"
  }
}