CVE-2026-91951

EUVD-2026-78808
FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in the urbdrc client channel's urb_send_current_frame_number_result() function. A malicious RDP server can send a crafted 28-byte USB redirection message to trigger a 4-byte write past the allocated 16-byte buffer, causing denial of service when verbose asserts are enabled.
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: 32.05%
Affected Products (NVD)
VendorProductVersion
freerdpfreerdp
3.14.0 ≤
𝑥
< 3.31.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
freerdp2
bookworm
2.11.7+dfsg1-6~deb12u1
fixed
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
Common Weakness Enumeration
References
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h5w2-q35j-443h
https://www.vulncheck.com/advisories/freerdp-3.14.0-through-3.30.0-out-of-bounds-write-via-urbdrc