CVE-2026-85090 FreeRDP before 3.31.0 Heap Out-of-Bounds Read via AVC444
A malicious RDP server can trigger a heap out-of-bounds read in FreeRDP, potentially causing crashes or leaking memory contents.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-85090?
CVE-2026-85090 is a medium-severity memory corruption vulnerability in Freerdp Freerdp, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-85090?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-85090?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-85090 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85090 exists.
Other vulnerabilities in Freerdp Freerdp
- CVE-2021-37594 Other in n/a
- CVE-2021-37595 Other in n/a
- CVE-2026-67305 FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr
- CVE-2026-66402 FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass
- CVE-2026-67289 FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection
Sources
Also known as DEBIAN-CVE-2026-85090, GHSA-57h7-vw2f-2f9x, GHSA-xxh7-m6m8-7839, UBUNTU-CVE-2026-85090.