CVE-2026-110834

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.

Score

CVSS 4.0 7.1 High

Status

Analyzed - disclosure@vulncheck.com

Published

2026-10-14

Last modified

2026-10-23

Weaknesses

CWE-476

Affected products

• Freerdp (Freerdp)

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-pw4j-ff39-9vjm
• https://www.vulncheck.com/advisories/freerdp-2.0.0-before-3.32.0-denial-of-service-via-serial-irp-null-handle