Freerdp Freerdp
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.
What this means for your business
- It affects Freerdp. It matters if your company, or a supplier that handles your data, runs it.
- Code showing how to exploit it has been published, but real attacks have not been confirmed.
- An attacker can use it remotely, over a network, without a login, but only after tricking someone into an action such as opening a file or a link.
- FIRST's prediction model gives it a 0.3% chance of attack attempts being seen in the next 30 days, ranking above 24% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Freerdp, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Fastnexa security experts
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Scoring
- CVSS
- 5.4 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L- CVSS v4
- 5.3
- Weakness
- CWE-125
- Assigned by
- disclosure@vulncheck.com
Dates
- Published
- 2026-09-03
- Last modified
- 2026-09-09
- Sources
- NVD
Affected products
- Freerdp Freerdp- 3.31.0
As listed in the NVD configuration data. Not a statement about your estate.
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