---
id: CVE-2026-109256
title: >-
  FreeRDP 3.10.0 through 3.32.2 contains a heap buffer overflow in the WinPR
  png_write_data callback that writes past the buffer after a realloc failure
summary: >-
  FreeRDP 3.10.0 through 3.32.2 contains a heap buffer overflow in the WinPR
  png_write_data callback that writes past the buffer after a realloc failure. A
  malicious RDP clipboard peer can supply a large CF_DIB image that triggers
  out-of-b…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-122
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:17.137'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109256'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-wf3x-658c-52m5'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-3.10.0-through-3.32.2-heap-buffer-overflow-in-winpr-png-conversion
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.178Z'
---

## Overview

FreeRDP 3.10.0 through 3.32.2 contains a heap buffer overflow in the WinPR png_write_data callback that writes past the buffer after a realloc failure. A malicious RDP clipboard peer can supply a large CF_DIB image that triggers out-of-bounds memcpy during PNG conversion, causing a client crash.

## Remediation

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