All vulnerabilities
CVE-2026-109240GHSA-9qqc-m43j-g4r2

FreeRDP 3.11.0 before 3.32.1 Reachable Assertion DoS via urb_isoch_transfer

FreeRDP FreeRDP
Open in ThreatlineRecord JSON
CVSS
2.3Low
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 13 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.22%Chance of exploitation activity in the next 30 days, higher than 11% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.32.1Fixed versionCVE List
Published12 Oct 2026Updated 13 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • FreeRDPaffected: 3.11.0 before 3.32.1CVE List
  • FreeRDPunaffected: 3.32.1CVE List

References 2