CVE-2026-91954

EUVD-2026-78630
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 33.21%
Affected Products (NVD)
VendorProductVersion
freerdpfreerdp
𝑥
< 3.31.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
freerdp2
bookworm
vulnerable
freerdp3
forky
3.32.2+dfsg-1
fixed
sid
3.32.2+dfsg-1
fixed
trixie
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
freerdp
bionic
needs-triage
jammy
dne
noble
dne
resolute
dne
xenial
needs-triage
freerdp2
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
dne
freerdp3
jammy
dne
noble
Fixed 3.31.0+dfsg-0ubuntu0.24.04.1
released
resolute
Fixed 3.31.0+dfsg-0ubuntu0.26.04.1
released
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
freerdp
RHEL 8
2:2.11.7-14.el8_10
fixed
RHEL 9
2:2.11.7-7.el9_8.8
fixed
freerdp-devel
RHEL 8
2:2.11.7-14.el8_10
fixed
RHEL 9
2:2.11.7-7.el9_8.8
fixed
freerdp-libs
RHEL 8
2:2.11.7-14.el8_10
fixed
RHEL 9
2:2.11.7-7.el9_8.8
fixed
libwinpr
RHEL 8
2:2.11.7-14.el8_10
fixed
RHEL 9
2:2.11.7-7.el9_8.8
fixed
libwinpr-devel
RHEL 8
2:2.11.7-14.el8_10
fixed
RHEL 9
2:2.11.7-7.el9_8.8
fixed
Common Weakness Enumeration
References
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-ffjr-p229-hpch
https://www.vulncheck.com/advisories/freerdp-before-3.31.0-null-pointer-dereference-via-nscodec