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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| tildearrow | furnace | ≤ 0.6.8.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | furnace | No fix yet | — |
| Debian 13 | furnace | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | furnace | No fix yet | — |
| Ubuntu 26.04 LTS | furnace | No fix yet | — |
References
- GitHub Issue #2966 issue-tracking
- https://github.com/tildearrow/furnace product
- https://github.com/tildearrow/furnace/commit/c120c72391e3229fe258e5759f43427febcb8693 patch
- https://github.com/tildearrow/furnace/blob/v0.6.8.3/src/engine/fileOps/ftm.cpp#L1597-L1605 technical-description
- https://hackmd.io/@haindpwn/furnace-ftm-import-notemap-and-groove-subsong-oob third-party-advisory
- VulnCheck Advisory: Furnace through 0.6.8.3 Out-of-Bounds Write via FamiTracker GROOVES Block Import third-party-advisory