All vulnerabilities
CVE-2026-109242GHSA-4mpr-hmqx-83q8

FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 Uninitialized Heap Disclosure via Progressive Codec Tile Upgrade

FreeRDP FreeRDP
Open in ThreatlineRecord JSON
CVSS
7.1High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 15 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.24%Chance of exploitation activity in the next 30 days, higher than 13% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.0.0Also 3.32.0CVE List
Published12 Oct 2026Updated 15 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 renders uninitialized heap memory from un-decoded progressive tiles because the tile->current buffer is allocated without zeroing. A malicious RDP server can send a crafted WBT_TILE_FIRST then WBT_TILE_UPGRADE sequence to paint heap bytes onscreen or abort the client process.

Text from CVE List

Affected versions 4

  • FreeRDPaffected: all versions before 3.0.0CVE List
  • FreeRDPaffected: 3.6.0 before 3.32.0CVE List
  • FreeRDPunaffected: 3.0.0CVE List
  • FreeRDPunaffected: 3.32.0CVE List

References 2