Description
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 a subsong count of 2 or more to write a groove pattern past the subsong vector, crashing Furnace when opened.
Metrics
CVSS 3.1 6.1/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| tildearrow | furnace | <= 0.6.8.3 |
References
- https://github.com/tildearrow/furnace
- https://github.com/tildearrow/furnace/blob/v0.6.8.3/src/engine/fileOps/ftm.cpp#L1597-L1605
- https://github.com/tildearrow/furnace/commit/c120c72391e3229fe258e5759f43427febcb8693
- https://github.com/tildearrow/furnace/issues/2966
- https://hackmd.io/@haindpwn/furnace-ftm-import-notemap-and-groove-subsong-oob
- https://www.vulncheck.com/advisories/furnace-through-0.6.8.3-out-of-bounds-write-via-famitracker-grooves-block-import
- https://hackmd.io/@haindpwn/furnace-ftm-import-notemap-and-groove-subsong-oob
Timeline
- Published
- Oct 26, 2026
- Last modified
- Nov 5, 2026
- NVD status
- Deferred