CVE-2026-24677 FreeRDP has a heap-buffer-overflow in ecam_encoder_compress_h264
An attacker can trigger a heap-buffer-overflow in FreeRDP's H.264 encoder by providing malicious server-controlled dimensions, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-24677?
CVE-2026-24677 is a high-severity memory corruption vulnerability in Freerdp Freerdp, published on 9 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, ecam_encoder_compress_h264 trusts server-controlled dimensions and does not validate the source buffer size, leading to an out-of-bounds read in sws_scale. This vulnerability is fixed in 3.22.0.
Weakness: CWE-416
Which versions are affected by CVE-2026-24677?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-24677?
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-2026-24677 being exploited?
There is no known exploitation of CVE-2026-24677 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-2026-24677, GHSA-xw37-j744-f8v7, MINI-hmgq-r9cm-27cw, UBUNTU-CVE-2026-24677.