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UBUNTU-CVE-2026-55193

Type: advisorySource: OSV1 source record

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP clients using TS Gateway accept a server-controlled max_xmit_frag value in libfreerdp/core/gateway/rpc_bind.c without bounding it to the 4088-byte ReceiveFragment allocation. A malicious gateway can advertise 65535 and then send a response fragment of the same length, causing rpc_channel_read in libfreerdp/core/gateway/rpc.c to write up to 65535 bytes into the smaller ReceiveFragment buffer. This can crash the client and may permit code execution through attacker-controlled heap corruption. This issue is fixed in version 3.27.0.

Announced Group revision 1
Original source ↗

UBUNTU-CVE-2026-55193

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:UBUNTU-CVE-2026-55193

freerdp

Source reference: /affected/0/package/name

Affected versions
1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1

Source reference: /affected/0/versions

1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2

Source reference: /affected/0/versions

1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3

Source reference: /affected/0/versions

1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

freerdp2

Source reference: /affected/1/package/name

Affected versions
2.0.0~git20170725.1.1648deb+dfsg1-1

Source reference: /affected/1/versions

2.0.0~git20170725.1.1648deb+dfsg1-5

Source reference: /affected/1/versions

2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu1

Source reference: /affected/1/versions

2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu2

Source reference: /affected/1/versions

2.0.0~git20170725.1.1648deb+dfsg1-6

Source reference: /affected/1/versions

2.0.0~git20170725.1.1648deb+dfsg1-6build1

Source reference: /affected/1/versions

2.0.0~git20170725.1.1648deb+dfsg1-7

Source reference: /affected/1/versions

2.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.1

Source reference: /affected/1/versions

2.1.1+dfsg1-0ubuntu0.18.04.1

Source reference: /affected/1/versions

2.2.0+dfsg1-0ubuntu0.18.04.1

Source reference: /affected/1/versions

2.2.0+dfsg1-0ubuntu0.18.04.2

Source reference: /affected/1/versions

2.2.0+dfsg1-0ubuntu0.18.04.3

Source reference: /affected/1/versions

2.2.0+dfsg1-0ubuntu0.18.04.4

Source reference: /affected/1/versions

2.2.0+dfsg1-0ubuntu0.18.04.4+esm1

Source reference: /affected/1/versions

2.2.0+dfsg1-0ubuntu0.18.04.4+esm2

Source reference: /affected/1/versions

2.2.0+dfsg1-0ubuntu0.18.04.4+esm3

Source reference: /affected/1/versions

2.2.0+dfsg1-0ubuntu0.18.04.4+esm4

Source reference: /affected/1/versions

2.2.0+dfsg1-0ubuntu0.18.04.4+esm5

Source reference: /affected/1/versions

2.2.0+dfsg1-0ubuntu0.18.04.4+esm6

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

freerdp

Source reference: /affected/2/package/name

Affected versions
1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1

Source reference: /affected/2/versions

1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.1

Source reference: /affected/2/versions

1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2

Source reference: /affected/2/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

freerdp2

Source reference: /affected/3/package/name

Affected versions
2.0.0~git20190204.1.2693389a+dfsg1-1

Source reference: /affected/3/versions

2.0.0~git20190204.1.2693389a+dfsg1-2

Source reference: /affected/3/versions

2.0.0~git20190204.1.2693389a+dfsg1-2build1

Source reference: /affected/3/versions

2.0.0~git20190204.1.2693389a+dfsg1-2build2

Source reference: /affected/3/versions

2.1.1+dfsg1-0ubuntu0.20.04.1

Source reference: /affected/3/versions

2.2.0+dfsg1-0ubuntu0.20.04.1

Source reference: /affected/3/versions

2.2.0+dfsg1-0ubuntu0.20.04.2

Source reference: /affected/3/versions

2.2.0+dfsg1-0ubuntu0.20.04.3

Source reference: /affected/3/versions

2.2.0+dfsg1-0ubuntu0.20.04.4

Source reference: /affected/3/versions

2.2.0+dfsg1-0ubuntu0.20.04.5

Source reference: /affected/3/versions

2.2.0+dfsg1-0ubuntu0.20.04.6

Source reference: /affected/3/versions

2.6.1+dfsg1-0ubuntu0.20.04.1

Source reference: /affected/3/versions

2.6.1+dfsg1-0ubuntu0.20.04.2

Source reference: /affected/3/versions

2.6.1+dfsg1-0ubuntu0.20.04.2+esm1

Source reference: /affected/3/versions

2.6.1+dfsg1-0ubuntu0.20.04.2+esm2

Source reference: /affected/3/versions

2.6.1+dfsg1-0ubuntu0.20.04.2+esm3

Source reference: /affected/3/versions

2.6.1+dfsg1-0ubuntu0.20.04.2+esm4

Source reference: /affected/3/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

freerdp2

Source reference: /affected/4/package/name

Affected versions
2.3.0+dfsg1-2build1

Source reference: /affected/4/versions

2.3.0+dfsg1-2ubuntu1

Source reference: /affected/4/versions

2.3.0+dfsg1-2ubuntu2

Source reference: /affected/4/versions

2.4.1+dfsg1-1

Source reference: /affected/4/versions

2.4.1+dfsg1-1ubuntu1

Source reference: /affected/4/versions

2.4.1+dfsg1-1ubuntu2

Source reference: /affected/4/versions

2.5.0+dfsg1-1

Source reference: /affected/4/versions

2.6.0+dfsg1-1

Source reference: /affected/4/versions

2.6.1+dfsg1-1

Source reference: /affected/4/versions

2.6.1+dfsg1-3

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu1

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.1

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.2

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.3

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.4

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.5

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.6

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.7

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.8

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.9

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.10

Source reference: /affected/4/versions

2.6.1+dfsg1-3ubuntu2.11

Source reference: /affected/4/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

freerdp3

Source reference: /affected/5/package/name

Affected versions
3.4.0+dfsg1-0ubuntu2

Source reference: /affected/5/versions

3.4.0+dfsg1-0ubuntu3

Source reference: /affected/5/versions

3.4.0+dfsg1-0ubuntu4

Source reference: /affected/5/versions

3.5.0+dfsg1-0ubuntu1

Source reference: /affected/5/versions

3.5.1+dfsg1-0ubuntu1

Source reference: /affected/5/versions

3.5.1+dfsg1-0ubuntu1.1

Source reference: /affected/5/versions

3.5.1+dfsg1-0ubuntu1.2

Source reference: /affected/5/versions

3.5.1+dfsg1-0ubuntu1.4

Source reference: /affected/5/versions

3.5.1+dfsg1-0ubuntu1.5

Source reference: /affected/5/versions

3.5.1+dfsg1-0ubuntu1.6

Source reference: /affected/5/versions

Fixed versions
3.30.0+dfsg-0ubuntu0.24.04.1

Source reference: /affected/5/ranges

Prerequisites
Not stated in this record

freerdp2

Source reference: /affected/6/package/name

Affected versions
2.10.0+dfsg1-1.1ubuntu1

Source reference: /affected/6/versions

2.11.2+dfsg1-1

Source reference: /affected/6/versions

2.11.2+dfsg1-1build1

Source reference: /affected/6/versions

2.11.2+dfsg1-1build3

Source reference: /affected/6/versions

2.11.5+dfsg1-1build1

Source reference: /affected/6/versions

2.11.5+dfsg1-1build2

Source reference: /affected/6/versions

2.11.5+dfsg1-1ubuntu0.1~esm1

Source reference: /affected/6/versions

2.11.5+dfsg1-1ubuntu0.1~esm2

Source reference: /affected/6/versions

2.11.5+dfsg1-1ubuntu0.1~esm3

Source reference: /affected/6/versions

2.11.5+dfsg1-1ubuntu0.1~esm4

Source reference: /affected/6/versions

2.11.5+dfsg1-1ubuntu0.1~esm5

Source reference: /affected/6/versions

2.11.5+dfsg1-1ubuntu0.1~esm6

Source reference: /affected/6/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

freerdp3

Source reference: /affected/7/package/name

Affected versions
3.14.0+dfsg-1ubuntu1

Source reference: /affected/7/versions

3.15.0+dfsg-2.1

Source reference: /affected/7/versions

3.16.0+dfsg-1ubuntu1

Source reference: /affected/7/versions

3.16.0+dfsg-2

Source reference: /affected/7/versions

3.16.0+dfsg-2ubuntu0.1

Source reference: /affected/7/versions

3.16.0+dfsg-2ubuntu0.3

Source reference: /affected/7/versions

3.16.0+dfsg-2ubuntu0.4

Source reference: /affected/7/versions

3.16.0+dfsg-2ubuntu0.5

Source reference: /affected/7/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

freerdp3

Source reference: /affected/8/package/name

Affected versions
3.16.0+dfsg-2

Source reference: /affected/8/versions

3.18.0+dfsg-1ubuntu1

Source reference: /affected/8/versions

3.19.0+dfsg-1

Source reference: /affected/8/versions

3.19.1+dfsg-1

Source reference: /affected/8/versions

3.20.0+dfsg-1

Source reference: /affected/8/versions

3.20.2+dfsg-1

Source reference: /affected/8/versions

3.21.0+dfsg-1

Source reference: /affected/8/versions

3.22.0+dfsg-1

Source reference: /affected/8/versions

3.24.1+dfsg-1ubuntu1

Source reference: /affected/8/versions

3.24.2+dfsg-1ubuntu1

Source reference: /affected/8/versions

3.24.2+dfsg-1ubuntu1.1

Source reference: /affected/8/versions

Fixed versions
3.30.0+dfsg-0ubuntu0.26.04.1

Source reference: /affected/8/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "freerdp",
      "purl": "pkg:deb/ubuntu/freerdp?arch=source&distro=xenial",
      "ecosystem": "Ubuntu:16.04:LTS"
    },
    "versions": [
      "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1",
      "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2",
      "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3",
      "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55193.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "freerdp-x11",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-cache1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-client1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-codec1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-common1.1.0",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-core1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-crypto1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-gdi1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-locale1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-plugins-standard",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-primitives1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-rail1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libfreerdp-utils1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-asn1-0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-bcrypt0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-credentials0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-credui0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-crt0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-crypto0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-dsparse0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-environment0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-error0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-file0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-handle0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-heap0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-input0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-interlocked0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-io0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-library0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-path0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-pipe0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-pool0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-registry0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-rpc0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-sspi0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-sspicli0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-synch0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-sysinfo0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-thread0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-timezone0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-utils0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-winhttp0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libwinpr-winsock0.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        },
        {
          "binary_name": "libxfreerdp-client1.1",
          "binary_version": "1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"
        }
      ]
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "freerdp2",
      "purl": "pkg:deb/ubuntu/freerdp2?arch=source&distro=esm-infra%2Fbionic",
      "ecosystem": "Ubuntu:Pro:18.04:LTS"
    },
    "versions": [
      "2.0.0~git20170725.1.1648deb+dfsg1-1",
      "2.0.0~git20170725.1.1648deb+dfsg1-5",
      "2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu1",
      "2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu2",
      "2.0.0~git20170725.1.1648deb+dfsg1-6",
      "2.0.0~git20170725.1.1648deb+dfsg1-6build1",
      "2.0.0~git20170725.1.1648deb+dfsg1-7",
      "2.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.1",
      "2.1.1+dfsg1-0ubuntu0.18.04.1",
      "2.2.0+dfsg1-0ubuntu0.18.04.1",
      "2.2.0+dfsg1-0ubuntu0.18.04.2",
      "2.2.0+dfsg1-0ubuntu0.18.04.3",
      "2.2.0+dfsg1-0ubuntu0.18.04.4",
      "2.2.0+dfsg1-0ubuntu0.18.04.4+esm1",
      "2.2.0+dfsg1-0ubuntu0.18.04.4+esm2",
      "2.2.0+dfsg1-0ubuntu0.18.04.4+esm3",
      "2.2.0+dfsg1-0ubuntu0.18.04.4+esm4",
      "2.2.0+dfsg1-0ubuntu0.18.04.4+esm5",
      "2.2.0+dfsg1-0ubuntu0.18.04.4+esm6"
    ],
    "database_specific": {
      "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55193.json"
    },
    "ecosystem_specific": {
      "binaries": [
        {
          "binary_name": "freerdp2-shadow-x11",
          "binary_version": "2.2.0+dfsg1-0ubuntu0.18.04.4+esm6"
        },
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          {
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        ]
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    ],
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      ],
      "availability": "No subscription required"
    }
  }
]

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Event
#51954 · Revision 1
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Publisher date
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