CVE-2026-109240

Low

Description

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.

SeverityLow

CVSS3.1

Exploit probability—

ProductFreerdp

PublishedOct 12, 2026

First seenOct 12, 2026

Weakness typeCWE-617CWE-617

How to fix

Update

freerdp freerdp3.32.1 or later

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9qqc-m43j-g4r2

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	3.11.0 ≤ v < 3.32.1	3.32.1

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