NULL Pointer Dereference in FreeRDP Affects Remote Desktop Gateway Functionality
CVE-2026-109942

7.1HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
13 October 2026

What is CVE-2026-109942?

The vulnerability in FreeRDP versions prior to 3.32.0 involves a NULL pointer dereference due to improper handling of CLOSE_CHANNEL packets within the RD Gateway. Specifically, the function rdg_process_control_packet accepts a header-only PKT_TYPE_CLOSE_CHANNEL packet, leading to a scenario where a null payload is passed without validation. This flaw allows an attacker controlling a malicious RD Gateway to crash the FreeRDP client by sending a crafted eight-byte CLOSE_CHANNEL header.

Affected Version(s)

FreeRDP 2.3.0 < 3.32.0

FreeRDP 3.32.0

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/freerdp-2.3.0-before...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kushalkhemka
opensec-intelligence
mayank-jangid-moon
skigeek16
.