Description
libTiMidity through 0.2.8 contains a stack out-of-bounds write vulnerability in the SoundFont loader that allows attackers to corrupt stack memory via unchecked generator operators in parse_gen. Attackers can supply a crafted .sf2 file with out-of-range pgen/igen operator values to write chosen 16-bit values near the stack Layer object, causing crashes and stack memory corruption.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| sezero | libtimidity | 0.2.8 – ≤ 0.2.8 | — |
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 | timidity | No fix yet | — |
| Debian 13 | timidity | No fix yet | — |
| Debian 12 | timidity | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | timidity | No fix yet | — |
| Ubuntu 26.04 LTS | timidity | No fix yet | — |
| Ubuntu 24.04 LTS | timidity | No fix yet | — |
| Ubuntu 22.04 LTS | timidity | No fix yet | — |
| Ubuntu 20.04 LTS | timidity | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | timidity | No fix yet | — |
| Ubuntu 16.04 LTS | timidity | No fix yet | — |
References
- https://hackmd.io/@haind-pwn/libtimidity-soundfont-generator-oper-oob-write technical-description exploit
- https://github.com/sezero/libtimidity/blob/a52adf6aee2635e2a16797213a089c2180e67757/src/sndfont.c#L468-L480 technical-description
- https://github.com/sezero/libtimidity product
- VulnCheck Advisory: libTiMidity through 0.2.8 Stack Out-of-Bounds Write via parse_gen in SoundFont Loader third-party-advisory