Vulnerability 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 Score
HIGH
Related Weaknesses (CWE)
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
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4464-r7qj-pgrx
FAQ
What is CVE-2026-91955?
CVE-2026-91955 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 pack...
How severe is CVE-2026-91955?
CVE-2026-91955 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-91955?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.