{
  "cveId": "CVE-2022-26362",
  "url": "https://patchblox.com/security/cve/CVE-2022-26362",
  "summary": "CVE-2022-26362 is fixed in xen on 1 platform, first by DEBIAN-CVE-2022-26362, released June 9, 2022. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "xen: x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regula...",
  "description": "x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen\u0027s safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.",
  "published": "2022-06-09T17:15:08Z",
  "severity": "medium",
  "cvss": 6.4,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00385,
  "epssPercentile": 0.32797,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "4.16.2-1",
      "fix": "DEBIAN-CVE-2022-26362",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-26362",
      "released": "2022-06-09T17:15:08Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "4.16.2-1",
      "fix": "DEBIAN-CVE-2022-26362",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-26362",
      "released": "2022-06-09T17:15:08Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 14",
      "fixedVersion": "4.16.2-1",
      "fix": "DEBIAN-CVE-2022-26362",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-26362",
      "released": "2022-06-09T17:15:08Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}