CVE-2026-91952: Freerdp

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

FreeRDP versions before 3.31.0 contain an infinite-loop denial of service in the pool_decode_rect function when decoding AVC444 metablocks with more region rectangles than preallocated worker array size. A malicious RDP server can send crafted AVC444 graphics updates causing the threaded decode path to loop indefinitely, consuming CPU and preventing normal client operation.

Affected products

• Freerdp Freerdp: after 3.11.0, before 3.31.0 (fixed in 3.31.0)

Published 2026-09-15. Last modified 2026-09-24.