CVE-2026-85090

FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the general_ChromaV1ToYUV444 function during AVC444 chroma plane reconstruction. A malicious RDP server can craft a RFX_AVC444_BITMAP_STREAM with specific frame geometry to trigger an out-of-bounds memory read past the allocated luma plane.

• CWE-125

• https://github.com/FreeRDP/FreeRDPProduct
• https://github.com/FreeRDP/FreeRDP/blob/3.30.0/libfreerdp/primitives/prim_YUV.cProduct
• https://github.com/FreeRDP/FreeRDP/commit/d0a481cb74ab57bca24791fe11b89464a332d3f1Patch
• https://github.com/FreeRDP/FreeRDP/releases/tag/3.31.0Product, Release Notes
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-57h7-vw2f-2f9xExploit, Mitigation, Vendor Advisory
• https://www.vulncheck.com/advisories/freerdp-before-3.31.0-heap-out-of-bounds-read-via-avc444Patch, Release Notes, Third Party Advisory
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-57h7-vw2f-2f9xExploit, Mitigation, Vendor Advisory

Published

Sep 3, 2026

Last Modified

Sep 9, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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