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Integer Overflow or Wraparound Affecting freerdp-server package, versions <2:3.6.3-1.amzn2023.0.13

Severity

 Recommended
high

Based on Amazon Linux security rating.

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  • Snyk IDSNYK-AMZN2023-FREERDPSERVER-18530126
  • published5 Aug 2026
  • disclosed19 Aug 2026
Report a new vulnerability Found a mistake?

Introduced: 5 Aug 2026

NewCVE-2026-55648  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 freerdp-server to version 2:3.6.3-1.amzn2023.0.13 or higher.
This issue was patched in ALAS2023-2026-2012.

NVD Description

Note: Versions mentioned in the description apply only to the upstream freerdp-server package and not the freerdp-server package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, freerdp_image_copy_from_icon_data in libfreerdp/codec/color.c calculates nWidth multiplied by nHeight multiplied by FreeRDPGetBytesPerPixel(format) in 32-bit arithmetic. A malicious RDP server can send a RAIL TS_ICON_INFO update with dimensions such as 32768 by 32768 and 32 bits per pixel so the required-size calculation wraps, bypassing the cbBitsColor source bounds check before freerdp_image_copy_no_overlap reads attacker-controlled icon data. This affects RemoteApp clients using the vulnerable library path, while xfreerdp has a caller-side mitigation. This issue is fixed in version 3.27.0.