{
  "cveId": "CVE-2026-89959",
  "url": "https://patchblox.com/security/cve/CVE-2026-89959",
  "summary": "CVE-2026-89959 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-89959, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "s390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  s390/vfio-ap: Fix control domain removal in vfio_ap_mdev_cfg_remove  The vfio_ap_config_remove function uses the bitmap_andnot function to clear bits from the matrix_mdev-\u003Ematrix.adm bitmap (specifies the control domains assigned to the mdev). This prevents the explicitly unplugged control domains from being removed the KVM guest. The bitmap_and function is used instead.",
  "published": "2026-09-16T11:17:06Z",
  "severity": "Important",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "epss": 0.00169,
  "epssPercentile": 0.06247,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89959",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.190-1",
      "fix": "DEBIAN-CVE-2026-89959",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89959",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-89959",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89959",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89959",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89959",
      "released": "2026-09-23T19:19:02Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-89959",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89959",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "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"
  }
}