GNU mtools before 4.0.50 has an out-of-bounds write in parse_vses in vfat.c.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
gnu:mtools
References 8
https://ftp.gnu.org/gnu/mtools/mtools-4.0.49.tar.gz
cve@mitre.org
https://github.com/deepin-community/mtools/blob/16d295331a1cfbcf02ad0b2f03c9b90…
cve@mitre.org
https://github.com/deepin-community/mtools/blob/16d295331a1cfbcf02ad0b2f03c9b90…
cve@mitre.org
https://lists.gnu.org/archive/html/info-gnu/2025-06/msg00004.html
cve@mitre.org
https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00001.html
cve@mitre.org
https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00002.html
cve@mitre.org
https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00004.html
cve@mitre.org
http://www.openwall.com/lists/oss-security/2026/10/31/1
af854a3a-2127-422b-91ae-364da2661108