Use-After-Free Vulnerability in FreeRDP Affected by Malicious Channel Requests
CVE-2026-121961

8.2HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
4 November 2026

What is CVE-2026-121961?

FreeRDP versions prior to 3.32.2 are vulnerable to a use-after-free attack in the freerdp-proxy DRDYNVC tracker. This occurs when a malicious server repeatedly sends CREATE_REQUEST_PDU messages for an active channel ID, creating a race condition during the data handling process. As a result, a borrowed context may be freed unexpectedly, which can lead to a crash of the proxy process, potentially disrupting service and opening avenues for further exploits.

Affected Version(s)

FreeRDP 0 < 3.32.2

FreeRDP 3.32.2

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/freerdp-before-3.32....
third-party-advisory

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kushalkhemka
mayank-jangid-moon
opensec-intelligence
.