ubuntu-cve-2026-22853
Vulnerability from osv_ubuntu
Published
2026-01-14 18:16
Modified
2026-06-30 16:18
Summary
Details

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, RDPEAR’s NDR array reader does not perform bounds checking on the on‑wire element count and can write past the heap buffer allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array. This vulnerability is fixed in 3.20.1.

Severity
6.8 (Medium)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "freerdp3-proxy",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "freerdp3-proxy-modules",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "freerdp3-sdl",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "freerdp3-shadow-x11",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "freerdp3-wayland",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "freerdp3-x11",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "libfreerdp-client3-3",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "libfreerdp-server-proxy3-3",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "libfreerdp-server3-3",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "libfreerdp-shadow-subsystem3-3",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "libfreerdp-shadow3-3",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "libfreerdp3-3",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "libwinpr-tools3-3",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "libwinpr3-3",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          },
          {
            "binary_name": "winpr3-utils",
            "binary_version": "3.16.0+dfsg-2ubuntu0.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "freerdp3",
        "purl": "pkg:deb/ubuntu/freerdp3@3.16.0+dfsg-2ubuntu0.3?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.16.0+dfsg-2ubuntu0.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.14.0+dfsg-1ubuntu1",
        "3.15.0+dfsg-2.1",
        "3.16.0+dfsg-1ubuntu1",
        "3.16.0+dfsg-2",
        "3.16.0+dfsg-2ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, RDPEAR\u2019s NDR array reader does not perform bounds checking on the on\u2011wire element count and can write past the heap buffer allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array. This vulnerability is fixed in 3.20.1.",
  "id": "UBUNTU-CVE-2026-22853",
  "modified": "2026-06-30T16:18:45Z",
  "published": "2026-01-14T18:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-22853"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-22853"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-47v9-p4gp-w5ch"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8105-1"
    }
  ],
  "related": [
    "USN-8105-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-22853"
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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