Use-After-Free Vulnerability in FreeRDP Client's Dynamic Virtual Channel
CVE-2026-121953

9.3CRITICAL

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
4 November 2026

What is CVE-2026-121953?

The FreeRDP client prior to version 3.32.2 contains a use-after-free vulnerability in the rdpgfx dynamic virtual channel, where a duplicate-name channel can overwrite the listener’s callback slot. This flaw allows a malicious RDP server to open and close a channel, subsequently sending data that may crash the client or potentially execute arbitrary code.

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:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

smaeljaish771
KeenSecurityLab
.