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CVE-2026-85090

5.4 · MEDIUM

FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the general_ChromaV1ToYUV444 function during AVC444 chroma plane reconstruction.

Published Sep 3, 2026freerdpCWE-125EPSS 0.28%

Overview

CVE-2026-85090 is a medium-severity vulnerability affecting freerdp freerdp. It was published on September 3, 2026 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from freerdp. Update freerdp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
freerdpfreerdp>= 0, < 3.31.0Affected

References

GitHubgithub.com/FreeRDP/FreeRDPGitHubgithub.com/FreeRDP/FreeRDP/blob/3.30.0/libfreerdp/primitives/prim_YUV.cGitHubgithub.com/FreeRDP/FreeRDP/commit/d0a481cb74ab57bca24791fe11b89464a332d3f1GitHubgithub.com/FreeRDP/FreeRDP/releases/tag/3.31.0GitHubgithub.com/FreeRDP/FreeRDP/security/advisories/GHSA-57h7-vw2f-2f9xRefwww.vulncheck.com/advisories/freerdp-before-3.31.0-heap-out-of-bounds-read-via-avc444GitHubgithub.com/FreeRDP/FreeRDP/security/advisories/GHSA-57h7-vw2f-2f9x

How CyberStrike helps

Frequently asked questions

What is CVE-2026-85090?

CVE-2026-85090 is a medium-severity vulnerability affecting freerdp freerdp. It was published on September 3, 2026 and has a CVSS 3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2026-85090?

This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-85090?

Check the references section for vendor advisories and patches from freerdp. Update freerdp to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-85090?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-85090 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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