CVE-2026-91954

MEDIUMCVSS 6.5

Description

FreeRDP before 3.31.0 contains a null pointer dereference vulnerability in gdi_surface_bits when processing Surface Bits commands with NSCodec codec ID. A malicious RDP server can crash a FreeRDP client by sending a crafted Surface Bits command claiming to use NSCodec, even when the codec is disabled.

Timeline

Published:September 15th, 2026 4:17 PM

Last modified:September 24th, 2026 12:16 PM

CVSS Scoring

CVSS v3: 6.5 (MEDIUM)

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

Affected Software

From NVD CPE configuration data

Vendors

freerdp

Products

freerdp

Weaknesses (CWE)

CWE-476

References & Reports

Advisories, patches, and third-party reports

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-ffjr-p229-hpchExploit
https://www.vulncheck.com/advisories/freerdp-before-3.31.0-null-pointer-dereference-via-nscodecThird Party Advisory

Source: NIST NVD · Data may lag official sources by up to one minute