CVE-2026-91963

EUVD-2026-78639
FreeRDP versions before 3.31.0 contain an uninitialized heap memory disclosure vulnerability in the urbdrc USB redirection channel. A malicious RDP server can induce failing USB transfers to read uninitialized heap memory from the client, defeating ASLR and enabling remote code execution when chained with memory corruption vulnerabilities.
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:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 51.75%
Affected Products (NVD)
VendorProductVersion
freerdpfreerdp
2.0.0 ≤
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
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
freerdp
Amazon Linux 2
2:2.11.7-1.amzn2.0.16
fixed
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
freerdp-debuginfo
Amazon Linux 2
2:2.11.7-1.amzn2.0.16
fixed
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
freerdp-debugsource
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
freerdp-devel
Amazon Linux 2
2:2.11.7-1.amzn2.0.16
fixed
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
freerdp-libs
Amazon Linux 2
2:2.11.7-1.amzn2.0.16
fixed
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
freerdp-libs-debuginfo
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
freerdp-server
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
freerdp-server-debuginfo
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
libwinpr
Amazon Linux 2
2:2.11.7-1.amzn2.0.16
fixed
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
libwinpr-debuginfo
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
libwinpr-devel
Amazon Linux 2
2:2.11.7-1.amzn2.0.16
fixed
Amazon Linux 2023
2:3.31.0-1.amzn2023
fixed
Common Weakness Enumeration
References
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hw7p-5h2r-83gq
https://www.vulncheck.com/advisories/freerdp-2.0.0-through-3.30.0-uninitialized-heap-memory-disclosure-via-urbdrc
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-hw7p-5h2r-83gq