CVE-2026-109242

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

State: Published
Severity: 7.1 High
Published: Oct 12, 2026
Updated: Oct 15, 2026
Reserved: Oct 12, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	7.1 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H	VulnCheck

Weaknesses

CWE-908 Use of Uninitialized Resource

Affected Products

Product	Versions
FreeRDPFreeRDP	before 3.0.0Affected 3.6.0 to before 3.32.0Affected 3.0.0Not affected 3.32.0Not affected

References

GitHub Security Advisory (GHSA-4mpr-hmqx-83q8)vendor-advisory
VulnCheck Advisory: FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 Uninitialized Heap Disclosure via Progressive Codec Tile Upgradethird-party-advisory

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