{"id":"CVE-2026-91952","title":"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","summary":"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 c…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-835","CWE-606"],"vendor":"FreeRDP","product":"FreeRDP","affected":["FreeRDP < 3.31.0"],"published":"2026-09-15","updated":"2026-09-17","sourceUpdated":"2026-09-17T15:16:57.597","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91952","references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m85m-3qxv-63h5","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/freerdp-before-3.31.0-denial-of-service-via-pool-decode-rect","label":"disclosure@vulncheck.com"},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m85m-3qxv-63h5","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91952.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-91952"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533948"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-91952"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91952"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-17T14:53:50.298567Z"},"epss":0.00346,"epssPercentile":0.28114,"ingestedAt":"2026-09-15T15:39:12.920Z","slug":"CVE-2026-91952","body":"## Overview\n\nFreeRDP 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-91952.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":206152,"id":"CVE-2026-91952","ts":1789658476428,"field":"exploit_available","old":"false","new":"true"}]}