CVE-2026-109251
MEDIUM
MEDIUM
Priority: 0.02
BB Relevance:
62/100
Published: 2026-10-12
Modified: 2026-11-02
First seen: 2026-11-02
Status: active
Attack Surface
Network
Low Complexity
No Auth
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
Passive
S:
X
AT:
Present
VC:
None
VI:
None
VA:
High
Description
FreeRDP before 3.32.0 stores the server-supplied signed MS-RDPEGT geometry origin unchecked in an unsigned video surface coordinate, so the blit clamp in gdiVideoShowSurface() wraps in 32-bit arithmetic and is skipped. A malicious RDP server can send a negative topLevelLeft to clients connecting with /video, causing an out-of-bounds write of decoded H.264 picture data or a client abort.
Weakness Classification (1)
References & Advisories (2)
Vendor Advisory
Third Party Advisory