What’s Vulnerable › Vulnerabilities

CVE-2026-109242: FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 Uninitialized Heap Disclosure via Progressive Codec Tile Upgrade

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-12 · updated 2026-10-15
• Weakness: CWE-908

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.

Affected products

• FreeRDP: before 3.0.0; from 3.6.0 before 3.32.0 — fixed in 3.0.0, 3.32.0

How to fix

Upgrade to a fixed version: FreeRDP 3.0.0, 3.32.0. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4mpr-hmqx-83q8
• https://www.vulncheck.com/advisories/freerdp-before-3.0.0-and-3.6.0-before-3.32.0-uninitialized-heap-disclosure-via-progressive-codec-tile-upgrade
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4mpr-hmqx-83q8

Get alerted when CVE-2026-109242 or the next vulnerability affects your stack