Medium severity · published Sep 3, 2026
CVE-2026-85090
FreeRDP before 3.31.0 Heap Out-of-Bounds Read via AVC444
5.4
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeRDP · FreeRDP
3.0.0 before 3.31.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-85090
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-85090
Product
https://github.com/FreeRDP/FreeRDP
Product
https://github.com/FreeRDP/FreeRDP/blob/3.30.0/libfreerdp/primitives/prim_YUV.c
Patch
https://github.com/FreeRDP/FreeRDP/commit/d0a481cb74ab57bca24791fe11b89464a332d3f1
Product
https://github.com/FreeRDP/FreeRDP/releases/tag/3.31.0
Exploit
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-57h7-vw2f-2f9x
Patch
https://www.vulncheck.com/advisories/freerdp-before-3.31.0-heap-out-of-bounds-read-via-avc444
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