CVE-2026-110834 FreeRDP 2.0.0 before 3.32.0 Denial of Service via Serial IRP Null Handle
A malicious RDP server can crash FreeRDP clients by sending out-of-lifecycle serial IRPs, causing a null pointer dereference in serial redirection.
- 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-2026-110834?
CVE-2026-110834 is a high-severity vulnerability in Freerdp Freerdp, published on 14 Oct 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 from 2.0.0 before 3.32.0 contains a null pointer dereference vulnerability that allows malicious RDP servers to crash clients by sending out-of-lifecycle serial IRPs. Attackers can send IRP_MJ_READ or IRP_MJ_WRITE before create or after close, causing CommReadFile or CommWriteFile to dereference a null handle and terminate clients using Linux serial redirection.
Weakness: CWE-476
Which versions are affected by CVE-2026-110834?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-110834?
Upgrade to a fixed version.
Is CVE-2026-110834 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-110834 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-2026-110834, GHSA-mff9-5vqw-qr9q, GHSA-pw4j-ff39-9vjm, UBUNTU-CVE-2026-110834.