Out-of-bounds Read in 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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (19.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP (Product, product)
- github.com/FreeRDP/FreeRDP/blob/3.30.0/libfreerdp/primitives/prim_YUV.c (Product, technical-description)
- github.com/FreeRDP/FreeRDP/commit/d0a481cb74ab57bca24791fe11b89464a332d3f1 (Patch, patch)
- github.com/FreeRDP/FreeRDP/releases/tag/3.31.0 (release-notes, Product, Release Notes)
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-57h7-vw2f-2f9x (Exploit, vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/freerdp-before-3.31.0-heap-out-of-bounds-read-via-… (Patch, Third Party Advisory, Release Notes, third-party-advisory)
Frequently asked questions
- What is CVE-2026-85090?
- CVE-2026-85090 is a medium-severity vulnerability in Freerdp, classified under Out-of-bounds Read. CVSS score: 5.4/10. Published 2026-09-03.
- How severe is CVE-2026-85090?
- Medium severity. CVSS v3 base score is 5.4 out of 10.