CVE-2026-91952

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.

• CWE-835

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m85m-3qxv-63h5Exploit, Mitigation, Vendor Advisory
• https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-pool-decode-rectThird Party Advisory
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m85m-3qxv-63h5Exploit, Mitigation, Vendor Advisory

Published

Sep 15, 2026

Last Modified

Sep 24, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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