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CVE-2026-109940 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:4.6 MEDIUMVector:CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g8jw-gv54-r94p	CISA-ADP	ExploitVendor AdvisoryMitigation
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g8jw-gv54-r94p	[email protected]	ExploitVendor AdvisoryMitigation
https://www.vulncheck.com/advisories/freerdp-3.0.0-beta1-before-3.32.0-stack-buffer-overflow-via-pkcs-11-key-name	[email protected]	Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-121	Stack-based Buffer Overflow	[email protected]

Affected Products

Product	Versions
freerdp freerdp	>= 3.0.0, < 3.32.0
CPE cpe:2.3:a:freerdp:freerdp:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 26, 2026	Initial Analysis	[email protected]
Oct 13, 2026	New CVE Received	[email protected]
Oct 13, 2026	CVE Modified	CISA-ADP