Bug 2519823 (CVE-2026-55192) - CVE-2026-55192 FreeRDP: FreeRDP: Out-of-bounds read leads to memory disclosure or client crash
Summary: CVE-2026-55192 FreeRDP: FreeRDP: Out-of-bounds read leads to memory disclosur...
Keywords:
Status: NEW
Alias: CVE-2026-55192
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-19 18:08 UTC by OSIDB Bzimport
Modified: 2026-08-20 14:37 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2026-08-19 18:08:29 UTC 
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.
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