CVE-2026-109946 in FreeRDP

Summary

by MITRE • 10/13/2026

FreeRDP 3.11.0 before 3.32.0 does not validate that AVC444 and AVC444v2 region widths are even before YUV444 conversion, so an odd width reaches an assertion and aborts the client. A malicious or compromised RDP server can terminate a connected FreeRDP client after RDPGFX AVC444 negotiation by sending an in-bounds region rectangle with an odd width.

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• Responsible: VulnCheck
• Reservation: 10/13/2026
• Disclosure: 10/13/2026
• Moderation: accepted
• Entry: VDB-417652
• CPE: 20261013
• CWE: CWE-20 (confirmed)
• CVSS: 6.5 (CNA)
• EPSS: 0.00000
• KEV: no
• Activities: very low
• Sector: Chemical, Education, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-109946
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-109946
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-109946/