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.

References

https://www.vulncheck.com/advisories/freerdp-3.11.0-before-3.32.1-reachable-assertion-dos-via-urb-isoch-transfer

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

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-97684

Details

Source: Mitre, NVD

Published: 2026-10-12

Updated: 2026-10-14

Risk Information

CVSS v2

Base Score: 2.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 3.1

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

Severity: Low

CVSS v4

Base Score: 2.3

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

Severity: Low

EPSS

EPSS: 0.00219