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.
References7
- github.com/tildearrow/furnace
- github.com/tildearrow/furnace/blob/v0.6.8.3/src/engine/fileOps/…
- github.com/tildearrow/furnace/commit/c120c72391e3229fe258e5759f…
- github.com/tildearrow/furnace/issues/2966
- hackmd.io/@haindpwn/furnace-ftm-import-notemap-and-groove-subso…
- www.vulncheck.com/advisories/furnace-through-0.6.8.3-out-of-bou…
- hackmd.io/@haindpwn/furnace-ftm-import-notemap-and-groove-subso…
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H - CVSS 4.0
-
6.9
MEDIUM
Score source: CNA
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 3 · as of 8 November 2026
- CWE
- CWE-129
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.