{"id":"CVE-2026-61497","title":"TinyUSB < 0.20.1 Integer Underflow via HID Report Descriptor Parser","summary":"TinyUSB before 0.20.1 contains an integer underflow vulnerability in the HID host report descriptor parser tuh_hid_parse_report_descriptor() in src/class/hid/hid_host.c that allows a malicious USB device to trigger an out-of-bounds read …","severity":"medium","cvss":5.2,"cvssVector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","cvssSource":"cna","cwe":["CWE-191"],"vendor":"hathach","product":"TinyUSB","affected":["TinyUSB < 0.20.1"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-03T21:28:00.459663Z"},"published":"2026-11-03","updated":"2026-11-03","sourceUpdated":"2026-11-03T21:28:16.965Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-61497","references":[{"url":"https://github.com/hathach/tinyusb/releases/tag/0.21.0","label":"Fixed Release Tag"},{"url":"https://github.com/hathach/tinyusb/commit/85047e1777f5c20b7a936aa905c746125d3ed066","label":"Patch Commit"},{"url":"https://www.vulncheck.com/advisories/tinyusb-integer-underflow-via-hid-report-descriptor-parser","label":"VulnCheck Advisory: TinyUSB < 0.20.1 Integer Underflow via HID Report Descriptor Parser"}],"tags":["cve.org"],"epss":0.00276,"epssPercentile":0.20177,"ingestedAt":"2026-11-05T20:33:06.527Z","slug":"CVE-2026-61497","body":"## Overview\n\nTinyUSB before 0.20.1 contains an integer underflow vulnerability in the HID host report descriptor parser tuh_hid_parse_report_descriptor() in src/class/hid/hid_host.c that allows a malicious USB device to trigger an out-of-bounds read by subtracting an item size from the remaining descriptor length without validating the item fits within the remaining buffer. Attackers can present a crafted USB device with a truncated report descriptor causing the uint16_t desc_len value to underflow, resulting in out-of-bounds memory reads and denial of service on the host system.\n\n## Affected\n\n- `TinyUSB < 0.20.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":28.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}