CVE-2026-91954

Public on 2026-09-15

Modified on 2026-09-16

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.

Severity

Medium

See what this means

CVSS v3 Base Score

6.5

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2 - Core	freerdp	Not Affected
Amazon Linux 2023	freerdp	Not Affected
Amazon Linux 2027 Preview	freerdp	Pending Fix

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-91954 Mitre: CVE-2026-91954