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Vulnerability · Published Oct 28, 2026 · Assigned by mitre

CVE-2026-118384

Medium 6.1

In plain English

A medium-severity security flaw in mtools from GNU. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.3%top 74.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

GNU mtools before 4.0.50 has an out-of-bounds write in parse_vses in vfat.c.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12mtoolsno fix listedDEBIAN-CVE-2026-118384
Debian:13mtoolsno fix listedDEBIAN-CVE-2026-118384
Debian:14mtoolsno fix listedDEBIAN-CVE-2026-118384
Ubuntu:22.04:LTSmtoolsno fix listedUBUNTU-CVE-2026-118384
Ubuntu:24.04:LTSmtoolsno fix listedUBUNTU-CVE-2026-118384
Ubuntu:26.04:LTSmtoolsno fix listedUBUNTU-CVE-2026-118384
Ubuntu:26.10mtoolsno fix listedUBUNTU-CVE-2026-118384

Affected products (as reported)

VendorProductVersions
GNU mtools 0 – before 4.0.50

Weakness: CWE-839 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

References