---
id: CVE-2026-67296
title: >-
  FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI
  server channel handler that fails to validate maximum PDU body length before
  stream allocation
summary: >-
  FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI
  server channel handler that fails to validate maximum PDU body length before
  stream allocation. A malicious RDP client can send a header-only RDPEI message
  wit…
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'
cwe:
  - CWE-20
vendor: freerdp
product: freerdp
affected:
  - freerdp < 3.29.0
patched:
  - freerdp 3.29.0
published: '2026-08-01'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T21:03:57.027'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67296'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-jm8r-22j6-4m4v'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-before-denial-of-service-via-rdpei-pdu
    label: disclosure@vulncheck.com
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-jm8r-22j6-4m4v'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67296.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-67296'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2510029'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-67296'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67296'
  - url: 'https://access.redhat.com/errata/RHSA-2026:61378'
  - url: 'https://access.redhat.com/errata/RHSA-2026:68706'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00363
epssPercentile: 0.30185
ingestedAt: '2026-08-02T05:17:49.606Z'
scores:
  nvd: 7.5
  vendor: 6.5
---

## Overview

FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI server channel handler that fails to validate maximum PDU body length before stream allocation. A malicious RDP client can send a header-only RDPEI message with a large declared body length to force excessive memory allocation on the server.

## Affected

- `freerdp < 3.29.0`

## Remediation

Upgrade past the affected range:

- `freerdp 3.29.0`

## Vendor advisories

- **RHSA-2026:61378** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-08-31 · [advisory](https://access.redhat.com/errata/RHSA-2026:61378)
- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 9 · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-67296.json)
- **RHSA-2026:68706** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:68706)