CVE-2026-67296 FreeRDP before 3.29.0 Denial of Service via RDPEI PDU
A malicious RDP client can cause excessive memory allocation and denial of service on FreeRDP servers by sending malformed RDPEI messages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-67296?
CVE-2026-67296 is a high-severity denial of service vulnerability in Freerdp Freerdp, published on 1 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI server channel handler that fails to validate maximum PDU body length before stream allocation. A malicious RDP client can send a header-only RDPEI message with a large declared body length to force excessive memory allocation on the server.
Weakness: CWE-20
Which versions are affected by CVE-2026-67296?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-67296?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-67296 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67296 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-2026-67296, GHSA-jm8r-22j6-4m4v, GHSA-xq3v-xj62-r99v, UBUNTU-CVE-2026-67296.