{
  "cveId": "CVE-2022-26356",
  "url": "https://patchblox.com/security/cve/CVE-2022-26356",
  "summary": "CVE-2022-26356 is fixed in xen on 1 platform, first by DEBIAN-CVE-2022-26356, released April 5, 2022. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "xen: Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XE...",
  "description": "Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.",
  "published": "2022-04-05T13:15:07Z",
  "severity": "medium",
  "cvss": 5.6,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H",
  "epss": 0.00241,
  "epssPercentile": 0.15322,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "4.16.1-1",
      "fix": "DEBIAN-CVE-2022-26356",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-26356",
      "released": "2022-04-05T13:15:07Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "4.16.1-1",
      "fix": "DEBIAN-CVE-2022-26356",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-26356",
      "released": "2022-04-05T13:15:07Z"
    },
    {
      "platform": "linux",
      "product": "xen",
      "release": "Debian 14",
      "fixedVersion": "4.16.1-1",
      "fix": "DEBIAN-CVE-2022-26356",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-26356",
      "released": "2022-04-05T13:15:07Z"
    }
  ],
  "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"
  }
}