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FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the websocket transport that allows a malicious gateway to crash clients… (CVE-2026-111373)

0
Medium
VulnerabilityCVE-2026-111373gcveosvubuntu-cve-2026-111373cve-2026-111373ubuntu-16-04-ltsubuntu-pro-18-04-ltsubuntu-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-pro-24-04-ltsubuntu-26-04-lts
Published: 10/16/2026 (10/16/2026, 00:00:00 UTC)
Source: GCVE Database
Product: freerdp

Description

FreeRDP versions before 3.32.0 contain a NULL pointer dereference vulnerability in the websocket transport. This flaw allows a malicious gateway to crash FreeRDP clients by sending zero-length ping frames. The vulnerability triggers an assertion failure that terminates the client process, causing a denial of service condition.

CVSS v3.1

Score 7.5high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

Ubuntu:16.04:LTSmore threats →ghsa
freerdp
pkg:deb/ubuntu/freerdp?arch=source&distro=xenial
Affected 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
Ubuntu:Pro:18.04:LTSmore threats →ghsa
freerdp2
pkg:deb/ubuntu/freerdp2?arch=source&distro=esm-infra/bionic
Affected 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
Ubuntu:18.04:LTSmore threats →ghsa
freerdp
pkg:deb/ubuntu/freerdp?arch=source&distro=bionic
Affected versions
=1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1=1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.1=1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2
Ubuntu:Pro:20.04:LTSmore threats →ghsa
freerdp2
pkg:deb/ubuntu/freerdp2?arch=source&distro=esm-infra/focal
Affected versions
=2.0.0~git20190204.1.2693389a+dfsg1-1=2.0.0~git20190204.1.2693389a+dfsg1-2=2.0.0~git20190204.1.2693389a+dfsg1-2build1=2.0.0~git20190204.1.2693389a+dfsg1-2build2=2.1.1+dfsg1-0ubuntu0.20.04.1=2.2.0+dfsg1-0ubuntu0.20.04.1=2.2.0+dfsg1-0ubuntu0.20.04.2=2.2.0+dfsg1-0ubuntu0.20.04.3=2.2.0+dfsg1-0ubuntu0.20.04.4=2.2.0+dfsg1-0ubuntu0.20.04.5=2.2.0+dfsg1-0ubuntu0.20.04.6=2.6.1+dfsg1-0ubuntu0.20.04.1=2.6.1+dfsg1-0ubuntu0.20.04.2=2.6.1+dfsg1-0ubuntu0.20.04.2+esm1=2.6.1+dfsg1-0ubuntu0.20.04.2+esm2=2.6.1+dfsg1-0ubuntu0.20.04.2+esm3=2.6.1+dfsg1-0ubuntu0.20.04.2+esm4
Ubuntu:22.04:LTSmore threats →ghsa
freerdp2
pkg:deb/ubuntu/freerdp2?arch=source&distro=jammy
Affected versions
=2.3.0+dfsg1-2build1=2.3.0+dfsg1-2ubuntu1=2.3.0+dfsg1-2ubuntu2=2.4.1+dfsg1-1=2.4.1+dfsg1-1ubuntu1=2.4.1+dfsg1-1ubuntu2=2.5.0+dfsg1-1=2.6.0+dfsg1-1=2.6.1+dfsg1-1=2.6.1+dfsg1-3=2.6.1+dfsg1-3ubuntu1=2.6.1+dfsg1-3ubuntu2=2.6.1+dfsg1-3ubuntu2.1=2.6.1+dfsg1-3ubuntu2.2=2.6.1+dfsg1-3ubuntu2.3=2.6.1+dfsg1-3ubuntu2.4=2.6.1+dfsg1-3ubuntu2.5=2.6.1+dfsg1-3ubuntu2.6=2.6.1+dfsg1-3ubuntu2.7=2.6.1+dfsg1-3ubuntu2.8=2.6.1+dfsg1-3ubuntu2.9=2.6.1+dfsg1-3ubuntu2.10=2.6.1+dfsg1-3ubuntu2.11
Ubuntu:24.04:LTSmore threats →ghsa
freerdp3
pkg:deb/ubuntu/freerdp3?arch=source&distro=noble
Affected versions
<3.32.0+dfsg-0ubuntu0.24.04.1=3.4.0+dfsg1-0ubuntu2=3.4.0+dfsg1-0ubuntu3=3.4.0+dfsg1-0ubuntu4=3.5.0+dfsg1-0ubuntu1=3.5.1+dfsg1-0ubuntu1=3.5.1+dfsg1-0ubuntu1.1=3.5.1+dfsg1-0ubuntu1.2=3.5.1+dfsg1-0ubuntu1.4=3.5.1+dfsg1-0ubuntu1.5=3.5.1+dfsg1-0ubuntu1.6=3.30.0+dfsg-0ubuntu0.24.04.1=3.30.0+dfsg-0ubuntu0.24.04.2=3.31.0+dfsg-0ubuntu0.24.04.1
Ubuntu:Pro:24.04:LTSmore threats →ghsa
freerdp2
pkg:deb/ubuntu/freerdp2?arch=source&distro=esm-apps/noble
Affected versions
=2.10.0+dfsg1-1.1ubuntu1=2.11.2+dfsg1-1=2.11.2+dfsg1-1build1=2.11.2+dfsg1-1build3=2.11.5+dfsg1-1build1=2.11.5+dfsg1-1build2=2.11.5+dfsg1-1ubuntu0.1~esm1=2.11.5+dfsg1-1ubuntu0.1~esm2=2.11.5+dfsg1-1ubuntu0.1~esm3=2.11.5+dfsg1-1ubuntu0.1~esm4=2.11.5+dfsg1-1ubuntu0.1~esm5=2.11.5+dfsg1-1ubuntu0.1~esm6
Ubuntu:26.04:LTSmore threats →ghsa
freerdp3
pkg:deb/ubuntu/freerdp3?arch=source&distro=resolute
Affected versions
<3.32.0+dfsg-0ubuntu0.26.04.1=3.16.0+dfsg-2=3.18.0+dfsg-1ubuntu1=3.19.0+dfsg-1=3.19.1+dfsg-1=3.20.0+dfsg-1=3.20.2+dfsg-1=3.21.0+dfsg-1=3.22.0+dfsg-1=3.24.1+dfsg-1ubuntu1=3.24.2+dfsg-1ubuntu1=3.24.2+dfsg-1ubuntu1.1=3.30.0+dfsg-0ubuntu0.26.04.1=3.30.0+dfsg-0ubuntu0.26.04.2=3.31.0+dfsg-0ubuntu0.26.04.1

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/22/2026, 17:36:40 UTC

Technical Analysis

The vulnerability in FreeRDP prior to version 3.32.0 is a NULL pointer dereference in the websocket transport implementation. Specifically, when the payload length of a ping frame is zero, the function websocket_reply_pong passes a nullptr stream to websocket_reply_close. This leads to an assertion failure that terminates the client process, resulting in a denial of service. The issue can be triggered by a malicious gateway sending zero-length ping frames to the client.

Potential Impact

Successful exploitation causes the FreeRDP client process to crash, resulting in denial of service. There is no indication of confidentiality, integrity, or privilege escalation impacts. The vulnerability affects client stability and availability.

Mitigation Recommendations

A patch is available that fixes this vulnerability in FreeRDP version 3.32.0 and later. Users should upgrade to version 3.32.0 or newer to remediate this issue. There is no indication that other mitigations or workarounds are provided or required.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-111373
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:26.04:LTS"]
Cvss Version
3.1

Threat ID: 6ada44fe4d27ba8daa6a5ad1

Added to database: 10/22/2026, 17:16:46 UTC

Last enriched: 10/22/2026, 17:36:40 UTC

Last updated: 10/22/2026, 17:36:40 UTC

Views: 2

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