{
  "cveId": "CVE-2026-23554",
  "url": "https://patchblox.com/security/cve/CVE-2026-23554",
  "summary": "CVE-2026-23554 is fixed in xen on 1 platform, first by SUSE-SU-2026:0908-1, released March 17, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "xen: The Intel EPT paging code uses an optimization to defer flushing of any cached EPT state until the p2m lock is droppe...",
  "description": "The Intel EPT paging code uses an optimization to defer flushing of any cached EPT state until the p2m lock is dropped, so that multiple modifications done under the same locked region only issue a single flush.  Freeing of paging structures however is not deferred until the flushing is done, and can result in freed pages transiently being present in cached state. Such stale entries can point to memory ranges not owned by the guest, thus allowing access to unintended memory regions.",
  "published": "2026-03-17T16:32:40Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "epss": 0.0013,
  "epssPercentile": 0.0265,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "4.17.7-0\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2026-23554",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-23554",
      "released": "2026-03-23T07:16:07Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "4.20.3\u002B127-gc42374a105-0\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-23554",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-23554",
      "released": "2026-03-23T07:16:07Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 14",
      "fixedVersion": "4.20.3\u002B127-gc42374a105-1",
      "fix": "DEBIAN-CVE-2026-23554",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-23554",
      "released": "2026-03-23T07:16:07Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "opensuse-leap 15.6",
      "fixedVersion": "4.18.5_12-150600.3.40.1",
      "fix": "SUSE-SU-2026:0908-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0908-1",
      "released": "2026-03-17T16:32:40Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "sles 15.6",
      "fixedVersion": "4.18.5_12-150600.3.40.1",
      "fix": "SUSE-SU-2026:0908-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0908-1",
      "released": "2026-03-17T16:32:40Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "sles 15.7",
      "fixedVersion": "4.20.2_08-150700.3.28.1",
      "fix": "SUSE-SU-2026:1093-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1093-1",
      "released": "2026-03-26T17:52:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}