{"id":"CVE-2026-109240","title":"FreeRDP 3.11.0 before 3.32.1 contains a reachable assertion vulnerability in urb_isoch_transfer that allows malicious RDP servers to crash clients by sending unvalidated OutputBufferSize values","summary":"FreeRDP 3.11.0 before 3.32.1 contains a reachable assertion vulnerability in urb_isoch_transfer that allows malicious RDP servers to crash clients by sending unvalidated OutputBufferSize values. Attackers can send a TS_URB_ISOCH_TRANSFER…","severity":"low","cvss":3.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L","cwe":["CWE-617"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10"],"published":"2026-10-12","updated":"2026-10-14","sourceUpdated":"2026-10-14T20:11:45.520","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109240","references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9qqc-m43j-g4r2","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/freerdp-3.11.0-before-3.32.1-reachable-assertion-dos-via-urb-isoch-transfer","label":"disclosure@vulncheck.com"},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9qqc-m43j-g4r2","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-109240.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-109240"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2549780"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-109240"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109240"}],"tags":["nvd","csaf","vex","red-hat","cve.org","exploit-available"],"epss":0.00265,"epssPercentile":0.18296,"ingestedAt":"2026-10-12T18:00:08.172Z","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-13T17:59:52.016134Z"},"slug":"CVE-2026-109240","body":"## Overview\n\nFreeRDP 3.11.0 before 3.32.1 contains a reachable assertion vulnerability in urb_isoch_transfer that allows malicious RDP servers to crash clients by sending unvalidated OutputBufferSize values. Attackers can send a TS_URB_ISOCH_TRANSFER IN-direction request with OutputBufferSize above INT32_MAX over URBDRC, triggering an assertion in libusb_udev_isoch_transfer that terminates the client.\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** · Low · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-13 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-109240.json)","depth":"twilight","depthScore":29,"depthScoreParts":{"impact":17.1,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":221041,"id":"CVE-2026-109240","ts":1792027020368,"field":"exploit_available","old":"false","new":"true"}]}