---
id: CVE-2026-110834
title: >-
  FreeRDP from 2.0.0 before 3.32.0 contains a null pointer dereference
  vulnerability that allows malicious RDP servers to crash clients by sending
  out-of-lifecycle serial IRPs
summary: >-
  FreeRDP from 2.0.0 before 3.32.0 contains a null pointer dereference
  vulnerability that allows malicious RDP servers to crash clients by sending
  out-of-lifecycle serial IRPs. Attackers can send IRP_MJ_READ or IRP_MJ_WRITE
  before create o…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
vendor: FreeRDP
product: FreeRDP
affected:
  - FreeRDP >= 2.0.0 < 3.32.0
published: '2026-10-14'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T16:17:47.170'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110834'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-pw4j-ff39-9vjm'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-2.0.0-before-3.32.0-denial-of-service-via-serial-irp-null-handle
    label: disclosure@vulncheck.com
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-pw4j-ff39-9vjm'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110834.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-110834'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2552985'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-110834'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110834'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T15:31:34.737668Z'
ingestedAt: '2026-10-15T00:02:07.172Z'
epss: 0.00312
epssPercentile: 0.24169
---

## Overview

FreeRDP from 2.0.0 before 3.32.0 contains a null pointer dereference vulnerability that allows malicious RDP servers to crash clients by sending out-of-lifecycle serial IRPs. Attackers can send IRP_MJ_READ or IRP_MJ_WRITE before create or after close, causing CommReadFile or CommWriteFile to dereference a null handle and terminate clients using Linux serial redirection.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110834.json)