CVE-2026-91955

Description

FreeRDP before 3.31.0 fails to validate client-supplied DesktopWidth and DesktopHeight values during GCC negotiation, allowing remote attackers to crash the server. Attackers can send crafted RDP packets with zero or oversized dimensions to trigger division-by-zero or assertion failures in multifragment update capability calculations, terminating the server process.

CVSS Vector

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx
• https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-desktop-dimensions
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx