Description
GNU mtools before 4.0.50 has an out-of-bounds write in parse_vses in vfat.c.
References6
- github.com/deepin-community/mtools/blob/16d295331a1cfbcf02ad0b2…
- github.com/deepin-community/mtools/blob/16d295331a1cfbcf02ad0b2…
- lists.gnu.org/archive/html/info-mtools/2026-10/msg00001.html
- lists.gnu.org/archive/html/info-mtools/2026-10/msg00002.html
- lists.gnu.org/archive/html/info-mtools/2026-10/msg00004.html
- www.openwall.com/lists/oss-security/2026/10/31/1
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 - EPSS — exploit probability
- 0% percentile: 25 · as of 2 November 2026
- CWE
- CWE-839
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.