CVE-2026-109940

FreeRDP 3.0.0-beta1 before 3.32.0 Stack Buffer Overflow via PKCS#11 Key Name

State: Published
Severity: 5.1 Medium
Published: Oct 13, 2026
Updated: Oct 13, 2026
Reserved: Oct 13, 2026

Description

FreeRDP 3.0.0-beta1 before 3.32.0 on Unix builds with PKCS#11 support has a stack-based buffer overflow in wprintKeyName() in WinPR's NCrypt PKCS#11 provider. It hex-encodes a key's CKA_ID, which can be up to 64 bytes, into a fixed 128-byte stack buffer. An attacker supplying a malicious PKCS#11 token or module whose key and matching certificate use a 55- to 64-byte CKA_ID can overflow the client's stack during key enumeration, causing a crash.

Scores

CVSS	Score	Vector	Source
4.0	5.1 Medium	CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	4.3 Medium	CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	VulnCheck

Weaknesses

CWE-121 Stack-based Buffer Overflow

Affected Products

Product	Versions
FreeRDPFreeRDP	3.0.0-beta1 to before 3.32.0Affected 3.32.0Not affected

References

GitHub Security Advisory (GHSA-g8jw-gv54-r94p)vendor-advisory
VulnCheck Advisory: FreeRDP 3.0.0-beta1 before 3.32.0 Stack Buffer Overflow via PKCS#11 Key Namethird-party-advisory

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