CVE catalog

CVE-2026-109240

Severity: Low · CVSS 3.1CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
Published: Sep 27, 2026, 10:00:00 PM UTC
Updated: Oct 12, 2026, 5:17:14 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.27% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	freerdp2	bookworm	`2.11.7+dfsg1-6~deb12u1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	freerdp2	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[freerdp2-dev]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[freerdp2-shadow-x11]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[freerdp2-wayland]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[freerdp2-x11]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[libfreerdp2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[libfreerdp-client2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[libfreerdp-server2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[libfreerdp-shadow2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[libfreerdp-shadow-subsystem2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[libuwac0-0]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[libuwac0-dev]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[libwinpr2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[libwinpr2-dev]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[libwinpr-tools2-2]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
[winpr-utils]Affected
Source package: [freerdp2]
Details (2)
- 2.11.7+dfsg1-6~deb12u1 · amd64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm
- 2.11.7+dfsg1-6~deb12u1 · arm64 · bookworm
  Affected
  nvd · freerdp2 · debian · bookworm

Observed: Oct 23, 2026, 7:48:11 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]