What’s Vulnerable › Vulnerabilities

CVE-2026-85090: FreeRDP before 3.31.0 Heap Out-of-Bounds Read via AVC444

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-09-03 · updated 2026-09-09
• Weakness: CWE-125

Description

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.

Affected products

• FreeRDP: before 3.31.0 — fixed in 3.31.0

How to fix

Upgrade to a fixed version: FreeRDP 3.31.0. Check the vendor advisory for mitigations.

References

• https://github.com/FreeRDP/FreeRDP
• https://github.com/FreeRDP/FreeRDP/blob/3.30.0/libfreerdp/primitives/prim_YUV.c
• https://github.com/FreeRDP/FreeRDP/commit/d0a481cb74ab57bca24791fe11b89464a332d3f1
• https://github.com/FreeRDP/FreeRDP/releases/tag/3.31.0
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-57h7-vw2f-2f9x
• https://www.vulncheck.com/advisories/freerdp-before-3.31.0-heap-out-of-bounds-read-via-avc444
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-57h7-vw2f-2f9x

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