{"id":"CVE-2026-116731","title":"Furnace through 0.6.8.3 Out-of-Bounds Write via FamiTracker GROOVES Block Import","summary":"Furnace through 0.6.8.3 contains an out-of-bounds write vulnerability in DivEngine::loadFTM() that allows attackers to corrupt heap memory via an unchecked subsong index in the GROOVES block. Attackers can craft a FamiTracker module with…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","cvssSource":"cna","cwe":["CWE-129"],"vendor":"tildearrow","product":"furnace","affected":["furnace <= 0.6.8.3"],"published":"2026-10-26","updated":"2026-10-26","sourceUpdated":"2026-10-26T21:52:32.953Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116731","references":[{"url":"https://github.com/tildearrow/furnace/issues/2966","label":"GitHub Issue #2966"},{"url":"https://github.com/tildearrow/furnace"},{"url":"https://github.com/tildearrow/furnace/commit/c120c72391e3229fe258e5759f43427febcb8693"},{"url":"https://github.com/tildearrow/furnace/blob/v0.6.8.3/src/engine/fileOps/ftm.cpp#L1597-L1605"},{"url":"https://hackmd.io/@haindpwn/furnace-ftm-import-notemap-and-groove-subsong-oob"},{"url":"https://www.vulncheck.com/advisories/furnace-through-0.6.8.3-out-of-bounds-write-via-famitracker-grooves-block-import","label":"VulnCheck Advisory: Furnace through 0.6.8.3 Out-of-Bounds Write via FamiTracker GROOVES Block Import"}],"tags":["cve.org"],"epss":0.00136,"epssPercentile":0.03005,"ingestedAt":"2026-10-27T16:11:59.118Z","slug":"CVE-2026-116731","body":"## Overview\n\nFurnace through 0.6.8.3 contains an out-of-bounds write vulnerability in DivEngine::loadFTM() that allows attackers to corrupt heap memory via an unchecked subsong index in the GROOVES block. Attackers can craft a FamiTracker module with a subsong count of 2 or more to write a groove pattern past the subsong vector, crashing Furnace when opened.\n\n## Affected\n\n- `furnace <= 0.6.8.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}