Use-After-Free Vulnerability in FreeRDP by FreeRDP
CVE-2026-121963

8.2HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
4 November 2026

What is CVE-2026-121963?

FreeRDP versions prior to 3.32.2 contain a use-after-free vulnerability affecting the dynamic rdpsnd channel. This flaw enables malicious Remote Desktop Protocol (RDP) servers to exploit the vulnerability by delivering a training PDU and subsequently closing the channel. When this occurs, the playback thread may attempt to access a freed callback, resulting in a crash of the client application. This vulnerability underscores the importance of proper memory management in software communication protocols to prevent unauthorized access and potential denial of service.

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
.