CVE-2026-22852 FreeRDP has a heap-buffer-overflow in audin_process_formats
A malicious RDP server can trigger a heap-buffer-overflow in the FreeRDP client, potentially leading to code execution or crashes.
- 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-2026-22852?
CVE-2026-22852 is a medium-severity memory corruption vulnerability in Freerdp Freerdp, published on 14 Jan 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 3.20.1, a malicious RDP server can trigger a heap-buffer-overflow write in the FreeRDP client when processing Audio Input (AUDIN) format lists. audin_process_formats reuses callback->formats_count across multiple MSG_SNDIN_FORMATS PDUs and writes past the newly allocated formats array, causing memory corruption and a crash. This vulnerability is fixed in 3.20.1.
Weakness: CWE-787
Which versions are affected by CVE-2026-22852?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-22852?
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-2026-22852 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-22852 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-2026-22852, GHSA-9chc-g79v-4qq4, MINI-8xpf-h6cc-p32h, UBUNTU-CVE-2026-22852.