Out-of-bounds Read Affecting freerdp3 package, versions <3.30.0+dfsg-0ubuntu0.24.04.1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.4% (33rd percentile)

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  • Snyk IDSNYK-UBUNTU2404-FREERDP3-17910146
  • published21 Jul 2026
  • disclosed19 Aug 2026

Introduced: 21 Jul 2026

CVE-2026-55192  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Ubuntu:24.04 freerdp3 to version 3.30.0+dfsg-0ubuntu0.24.04.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp3 package and not the freerdp3 package as distributed by Ubuntu. See How to fix? for Ubuntu:24.04 relevant fixed versions and status.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP H.264 decoder backends can return YUV planes sized from the bitstream without comparing the decoded width and height to the RDPGFX surface dimensions used to validate region rectangles. A malicious RDP server can provide an AVC420 or AVC444 bitstream whose decoded frame is smaller than the negotiated surface, causing yuv420_context_decode and the YUV-to-RGB conversion paths to read beyond the decoder-owned planes in libfreerdp/codec/h264.c and the selected H.264 backend. This can disclose client memory or crash the client. This issue is fixed in version 3.27.0.

CVSS Base Scores

version 3.1