CVE-2026-33985 FreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read
An attacker can trigger a heap out-of-bounds read in FreeRDP to leak sensitive memory data to the screen.
- 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-2026-33985?
CVE-2026-33985 is a medium-severity memory corruption vulnerability in Freerdp Freerdp, published on 30 Mar 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 is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, pixel data from adjacent heap memory is rendered to screen, potentially leaking sensitive data to the attacker. This issue has been patched in version 3.24.2.
Which versions are affected by CVE-2026-33985?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-33985?
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-2026-33985 being exploited?
There is no known exploitation of CVE-2026-33985 in the wild and no public exploit code.
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-2026-33985, GHSA-x6gr-8p7h-5h85, UBUNTU-CVE-2026-33985.