Out-of-bounds Write Affecting freerdp-server-debuginfo package, versions <2:3.10.3-3.el10_0.9


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
1.04% (61st percentile)

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  • Snyk IDSNYK-RHEL10-FREERDPSERVERDEBUGINFO-18320732
  • published27 Jul 2026
  • disclosed26 May 2026

Introduced: 26 May 2026

CVE-2026-40033  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade RHEL:10 freerdp-server-debuginfo to version 2:3.10.3-3.el10_0.9 or higher.
This issue was patched in RHSA-2026:46393.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp-server-debuginfo package and not the freerdp-server-debuginfo package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

FreeRDP before 3.26.0 contains a heap-buffer-overflow vulnerability in gdi_CacheToSurface that allows remote attackers to write out-of-bounds heap memory. The vulnerability occurs because rectangle validation clamps coordinates to UINT16_MAX but performs copy operations using unclamped cache entry dimensions, enabling malicious RDP servers to trigger large out-of-bounds writes and potentially achieve remote code execution or client crash.

CVSS Base Scores

version 3.1