Name: CVE-2026-91957: Use After Free
Creator: Rapid7
Published: 2026-09-15T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-91957, CWE-416, CVSS 3.1, EPSS 0.00356

FreeRDP before 3.31.0 contains a use-after-free vulnerability in the smartcard RDPDR device handler when worker thread creation fails after device registration. Attackers can trigger thread creation failure during channel setup to cause device pointer deallocation while devman retains a reference, leading to crash or code execution.

CVSS Details

CVSS 4.0 Base Score: 2.3 (LOW)
CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 3.1
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Amazon_linux_2023	—	Upgrade libwinpr-develUpgrade freerdp-libs-debuginfoUpgrade freerdp-debuginfoUpgrade freerdp-develUpgrade freerdpUpgrade freerdp-debugsourceUpgrade freerdp-libsUpgrade libwinpr-debuginfoUpgrade freerdp-server-debuginfoUpgrade libwinprUpgrade freerdp-server	Sep 30, 2026	Sep 15, 2026
Redhat_linux	—	No solution exists	Sep 17, 2026	Sep 15, 2026
Ubuntu	—	Upgrade freerdp3	Sep 22, 2026	Sep 16, 2026

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CVSS Details

Covered by Rapid7

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