Description
GNU mtools before 4.0.50 has an out-of-bounds write in parse_vses in vfat.c.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GNU | mtools | < 4.0.50 | 4.0.50 |
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 | mtools | No fix yet | — |
| Debian 13 | mtools | No fix yet | — |
| Debian 12 | mtools | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | mtools | No fix yet | — |
| Ubuntu 26.04 LTS | mtools | No fix yet | — |
| Ubuntu 24.04 LTS | mtools | No fix yet | — |
| Ubuntu 22.04 LTS | mtools | No fix yet | — |
| Ubuntu 20.04 LTS | mtools | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | mtools | No fix yet | — |
| Ubuntu 16.04 LTS | mtools | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | mtools | No fix yet | — |
References
- https://github.com/deepin-community/mtools/blob/16d295331a1cfbcf02ad0b2f03c9b906197cf3ee/vfat.c#L444-L445 product
- https://github.com/deepin-community/mtools/blob/16d295331a1cfbcf02ad0b2f03c9b906197cf3ee/vfat.c#L399 product
- https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00002.html
- https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00004.html
- https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00001.html