{
  "cveId": "CVE-2026-42490",
  "url": "https://patchblox.com/security/cve/CVE-2026-42490",
  "summary": "CVE-2026-42490 is fixed in xen on 1 platform, first by SUSE-SU-2026:2329-1, released June 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "xen: [This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to...",
  "description": "[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.]  To create and manage guests, domctl operations are used by the control domain, a possible Xenstore domain, or by a domain controlling a particular guest.  Some of these operations may not be executed in parallel, so a system-wide lock is used.  The way that lock is acquired is, however, not providing any fairness.  This is CVE-2026-42489.  Furthermore, with XSM/Flask in use, the lock acquire will, for some operations, occur ahead of any permission checking.  This is CVE-2026-42490.",
  "published": "2026-06-10T07:39:36Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.002,
  "epssPercentile": 0.09895,
  "priority": "Routine",
  "priorityTier": 4,
  "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-2026-42490",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-42490",
      "released": "2026-06-18T14:17:25Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "4.20.3\u002B127-gc42374a105-0\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-42490",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-42490",
      "released": "2026-06-18T14:17:25Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 14",
      "fixedVersion": "4.20.3\u002B127-gc42374a105-1",
      "fix": "DEBIAN-CVE-2026-42490",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-42490",
      "released": "2026-06-18T14:17:25Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "sles 15.6",
      "fixedVersion": "4.18.5_18-150600.3.50.1",
      "fix": "SUSE-SU-2026:2329-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2329-1",
      "released": "2026-06-10T07:39:36Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "sles 15.7",
      "fixedVersion": "4.20.3_06-150700.3.41.1",
      "fix": "SUSE-SU-2026:2364-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2364-1",
      "released": "2026-06-11T06:54:28Z"
    }
  ],
  "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"
  }
}