{
  "cveId": "CVE-2026-91955",
  "url": "https://patchblox.com/security/cve/CVE-2026-91955",
  "summary": "CVE-2026-91955 is fixed in 23 products on 1 platform, first by freerdp3-shadow-x11 3.31.0\u002Bdfsg-0ubuntu0.24.04.1, released September 14, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "freerdp3: FreeRDP before 3.31.0 fails to validate client-supplied DesktopWidth and DesktopHeight values during GCC negotiation,...",
  "description": "FreeRDP before 3.31.0 fails to validate client-supplied DesktopWidth and DesktopHeight values during GCC negotiation, allowing remote attackers to crash the server. Attackers can send crafted RDP packets with zero or oversized dimensions to trigger division-by-zero or assertion failures in multifragment update capability calculations, terminating the server process.",
  "published": "2026-09-15T09:17:00Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00572,
  "epssPercentile": 0.47543,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "freerdp-proxy",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp-proxy 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp-proxy-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-proxy-modules",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp-proxy-modules 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp-proxy-modules-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-sdl",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp-sdl 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp-sdl-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-shadow-x11",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp-shadow-x11 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp-shadow-x11-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-wayland",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp-wayland 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp-wayland-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-x11",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp-x11 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp-x11-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp3",
      "release": "Debian 14",
      "fixedVersion": "3.31.0\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-91955",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-91955",
      "released": "2026-09-17T18:08:56Z"
    },
    {
      "platform": "linux",
      "product": "freerdp3-proxy",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp3-proxy 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp3-proxy-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp3-proxy-modules",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp3-proxy-modules 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp3-proxy-modules-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp3-sdl",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp3-sdl 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp3-sdl-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp3-shadow-x11",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "freerdp3-shadow-x11 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freerdp3-shadow-x11-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "freerdp3-shadow-x11",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp3-shadow-x11 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp3-shadow-x11-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp3-wayland",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "freerdp3-wayland 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freerdp3-wayland-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "freerdp3-wayland",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp3-wayland 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp3-wayland-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp3-x11",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "freerdp3-x11 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-freerdp3-x11-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "freerdp3-x11",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "freerdp3-x11 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-freerdp3-x11-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-client3-3",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "libfreerdp-client3-3 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libfreerdp-client3-3-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-client3-3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "libfreerdp-client3-3 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libfreerdp-client3-3-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-server-proxy3-3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "libfreerdp-server-proxy3-3 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libfreerdp-server-proxy3-3-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-server3-3",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "libfreerdp-server3-3 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libfreerdp-server3-3-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-server3-3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "libfreerdp-server3-3 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libfreerdp-server3-3-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow-subsystem3-3",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "libfreerdp-shadow-subsystem3-3 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libfreerdp-shadow-subsystem3-3-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow-subsystem3-3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "libfreerdp-shadow-subsystem3-3 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libfreerdp-shadow-subsystem3-3-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow3-3",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "libfreerdp-shadow3-3 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libfreerdp-shadow3-3-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow3-3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "libfreerdp-shadow3-3 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libfreerdp-shadow3-3-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp3-3",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "libfreerdp3-3 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libfreerdp3-3-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp3-3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "libfreerdp3-3 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libfreerdp3-3-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libwinpr-tools3-3",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "libwinpr-tools3-3 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libwinpr-tools3-3-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "libwinpr-tools3-3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "libwinpr-tools3-3 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libwinpr-tools3-3-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libwinpr3-3",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "libwinpr3-3 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libwinpr3-3-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "libwinpr3-3",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "libwinpr3-3 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libwinpr3-3-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "winpr-utils",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "winpr-utils 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-winpr-utils-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "winpr3-utils",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "fix": "winpr3-utils 3.31.0\u002Bdfsg-0ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-winpr3-utils-3.31.0-dfsg-0ubuntu0.24.04.1",
      "released": "2026-09-14T12:57:08Z"
    },
    {
      "platform": "linux",
      "product": "winpr3-utils",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "fix": "winpr3-utils 3.31.0\u002Bdfsg-0ubuntu0.26.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-winpr3-utils-3.31.0-dfsg-0ubuntu0.26.04.1",
      "released": "2026-09-15T09:17:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}