Use-After-Free Vulnerability in FreeRDP Smartcard Emulation
CVE-2026-121955

8.7HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
4 November 2026

What is CVE-2026-121955?

FreeRDP versions prior to 3.32.2 are susceptible to a use-after-free vulnerability in the Emulate_SCardReleaseContext function. This flaw arises when the emulated SCardContext is freed before its associated worker thread has been properly cancelled and joined. Attackers can exploit this vulnerability by sending a malicious ESTABLISHCONTEXT request, followed by a long-timeout GETSTATUSCHANGE, and finally a RELEASECONTEXT smartcard I/O control request (IRP). Such exploitation can lead to memory corruption or crash clients utilizing smartcard emulation, potentially compromising system stability and data integrity.

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:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.