Name: CVE-2026-109240: Reachable Assertion
Creator: Rapid7
Published: 2026-10-12T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-109240, CWE-617, CVSS 3.1, EPSS 0.00262

FreeRDP 3.11.0 before 3.32.1 contains a reachable assertion vulnerability in urb_isoch_transfer that allows malicious RDP servers to crash clients by sending unvalidated OutputBufferSize values. Attackers can send a TS_URB_ISOCH_TRANSFER IN-direction request with OutputBufferSize above INT32_MAX over URBDRC, triggering an assertion in libusb_udev_isoch_transfer that terminates the client.

CVSS Details

CVSS 4.0 Base Score: 2.3 (LOW)
CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/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 freerdp-develUpgrade freerdpUpgrade freerdp-server-debuginfoUpgrade libwinprUpgrade libwinpr-debuginfoUpgrade libwinpr-develUpgrade freerdp-libsUpgrade freerdp-libs-debuginfoUpgrade freerdp-serverUpgrade freerdp-debugsourceUpgrade freerdp-debuginfo	Oct 28, 2026	Oct 12, 2026
Ubuntu	—	Upgrade freerdp3	Oct 18, 2026	Oct 12, 2026

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CVSS Details

Covered by Rapid7

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