{
  "cveId": "CVE-2021-41159",
  "url": "https://patchblox.com/security/cve/CVE-2021-41159",
  "summary": "CVE-2021-41159 is fixed in 25 products on 1 platform, first by freerdp2-shadow-x11 2.2.0\u002Bdfsg1-0ubuntu0.18.04.2, released October 21, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "freerdp2-shadow-x11: FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),released under the Apache license",
  "description": "FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),released under the Apache license. All FreeRDP clients prior to version2.4.1 using gateway connections (\u0060/gt:rpc\u0060) fail to validate input data. Amalicious gateway might allow client memory to be written out of bounds.This issue has been resolved in version 2.4.1. If you are unable to updatethen use \u0060/gt:http\u0060 rather than /gt:rdp connections if possible or use adirect connection without a gateway.",
  "published": "2021-10-21T12:15:00Z",
  "severity": "Medium",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.01492,
  "epssPercentile": 0.74309,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "freerdp",
      "release": "RHEL 8",
      "fixedVersion": "2:2.2.0-7.el8_5",
      "fix": "RHSA-2021:4622",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4622",
      "released": "2021-11-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp",
      "release": "almalinux 8",
      "fixedVersion": "2:2.2.0-7.el8_5",
      "fix": "ALSA-2021:4622",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4622",
      "released": "2021-11-11T09:34:33Z"
    },
    {
      "platform": "linux",
      "product": "freerdp",
      "release": "ol 8",
      "fixedVersion": "2:2.2.0-7.el8_5",
      "fix": "ELSA-2021-4622",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4622",
      "released": "2021-11-18T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp",
      "release": "rocky 8",
      "fixedVersion": "2:2.2.0-7.el8_5",
      "fix": "RLSA-2021:4622",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2021-4622",
      "released": "2021-11-11T09:34:33Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-devel",
      "release": "RHEL 8",
      "fixedVersion": "2:2.2.0-7.el8_5",
      "fix": "RHSA-2021:4622",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4622",
      "released": "2021-11-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-devel",
      "release": "almalinux 8",
      "fixedVersion": "2:2.2.0-7.el8_5",
      "fix": "ALSA-2021:4622",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4622",
      "released": "2021-11-11T09:34:33Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-devel",
      "release": "ol 8",
      "fixedVersion": "2:2.2.0-7.el8_5",
      "fix": "ELSA-2021-4622",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4622",
      "released": "2021-11-18T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-libs",
      "release": "RHEL 8",
      "fixedVersion": "2:2.2.0-7.el8_5",
      "fix": "RHSA-2021:4622",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4622",
      "released": "2021-11-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-libs",
      "release": "almalinux 8",
      "fixedVersion": "2:2.2.0-7.el8_5",
      "fix": "ALSA-2021:4622",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4622",
      "released": "2021-11-11T09:34:33Z"
    },
    {
      "platform": "linux",
      "product": "freerdp-libs",
      "release": "ol 8",
      "fixedVersion": "2:2.2.0-7.el8_5",
      "fix": "ELSA-2021-4622",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4622",
      "released": "2021-11-18T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-shadow-x11",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "fix": "freerdp2-shadow-x11 2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freerdp2-shadow-x11-2.2.0-dfsg1-0ubuntu0.18.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-shadow-x11",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "fix": "freerdp2-shadow-x11 2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freerdp2-shadow-x11-2.2.0-dfsg1-0ubuntu0.20.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-shadow-x11",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "freerdp2-shadow-x11 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freerdp2-shadow-x11-2.3.0-dfsg1-2ubuntu2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-shadow-x11",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "freerdp2-shadow-x11 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-freerdp2-shadow-x11-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-shadow-x11",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "freerdp2-shadow-x11 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-freerdp2-shadow-x11-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-wayland",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "fix": "freerdp2-wayland 2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freerdp2-wayland-2.2.0-dfsg1-0ubuntu0.18.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-wayland",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "fix": "freerdp2-wayland 2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freerdp2-wayland-2.2.0-dfsg1-0ubuntu0.20.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-wayland",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "freerdp2-wayland 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freerdp2-wayland-2.3.0-dfsg1-2ubuntu2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-wayland",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "freerdp2-wayland 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-freerdp2-wayland-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-wayland",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "freerdp2-wayland 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-freerdp2-wayland-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-x11",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "fix": "freerdp2-x11 2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-freerdp2-x11-2.2.0-dfsg1-0ubuntu0.18.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-x11",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "fix": "freerdp2-x11 2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-freerdp2-x11-2.2.0-dfsg1-0ubuntu0.20.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-x11",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "freerdp2-x11 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-freerdp2-x11-2.3.0-dfsg1-2ubuntu2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-x11",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "freerdp2-x11 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-freerdp2-x11-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "freerdp2-x11",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "freerdp2-x11 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-freerdp2-x11-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-client2-2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "fix": "libfreerdp-client2-2 2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libfreerdp-client2-2-2.2.0-dfsg1-0ubuntu0.18.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-client2-2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "fix": "libfreerdp-client2-2 2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libfreerdp-client2-2-2.2.0-dfsg1-0ubuntu0.20.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-client2-2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "libfreerdp-client2-2 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libfreerdp-client2-2-2.3.0-dfsg1-2ubuntu2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-client2-2t64",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "libfreerdp-client2-2t64 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libfreerdp-client2-2t64-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-client2-2t64",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "libfreerdp-client2-2t64 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-libfreerdp-client2-2t64-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-server2-2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "fix": "libfreerdp-server2-2 2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libfreerdp-server2-2-2.2.0-dfsg1-0ubuntu0.18.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-server2-2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "fix": "libfreerdp-server2-2 2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libfreerdp-server2-2-2.2.0-dfsg1-0ubuntu0.20.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-server2-2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "libfreerdp-server2-2 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libfreerdp-server2-2-2.3.0-dfsg1-2ubuntu2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-server2-2t64",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "libfreerdp-server2-2t64 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libfreerdp-server2-2t64-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-server2-2t64",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "libfreerdp-server2-2t64 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-libfreerdp-server2-2t64-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow-subsystem2-2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "fix": "libfreerdp-shadow-subsystem2-2 2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libfreerdp-shadow-subsystem2-2-2.2.0-dfsg1-0ubuntu0.18.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow-subsystem2-2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "fix": "libfreerdp-shadow-subsystem2-2 2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libfreerdp-shadow-subsystem2-2-2.2.0-dfsg1-0ubuntu0.20.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow-subsystem2-2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "libfreerdp-shadow-subsystem2-2 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libfreerdp-shadow-subsystem2-2-2.3.0-dfsg1-2ubuntu2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow-subsystem2-2t64",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "libfreerdp-shadow-subsystem2-2t64 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libfreerdp-shadow-subsystem2-2t64-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow-subsystem2-2t64",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "libfreerdp-shadow-subsystem2-2t64 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-libfreerdp-shadow-subsystem2-2t64-2.3.0-dfsg1-2ubuntu2",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow2-2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "fix": "libfreerdp-shadow2-2 2.2.0\u002Bdfsg1-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libfreerdp-shadow2-2-2.2.0-dfsg1-0ubuntu0.18.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow2-2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "fix": "libfreerdp-shadow2-2 2.2.0\u002Bdfsg1-0ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libfreerdp-shadow2-2-2.2.0-dfsg1-0ubuntu0.20.04.2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow2-2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
      "fix": "libfreerdp-shadow2-2 2.3.0\u002Bdfsg1-2ubuntu2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libfreerdp-shadow2-2-2.3.0-dfsg1-2ubuntu2",
      "released": "2021-10-21T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libfreerdp-shadow2-2t64",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.3.0\u002Bdfsg1-2ubuntu2",
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  ],
  "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"
  }
}