CVE-2026-118384
GNU mtools before 4.0.50 has an out-of-bounds write in parse_vses in vfat.c.
Executive briefing
The source record describes: GNU mtools before 4.0.50 has an out-of-bounds write in parse_vses in vfat.c. The practical risk depends on whether an affected product/version is present, reachable and configured in an exploitable way. Review the affected-product evidence and linked vendor advisories before assigning exposure status.
Evidence confidence: Limited Evidence-derived, not an exploitability verdict
Severity & attack characteristics
CVSS vector:CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Technical explanation & impact
The technical mechanism is not expanded beyond the source description unless a referenced advisory supplies additional evidence. Read the linked vendor/CERT advisories for root-cause detail.
Potential impact must be interpreted from the published CVSS impact metrics and the affected component. A CVSS impact score is not proof that a particular asset is exploitable.
Weakness classification
CWE-839Affected products and versions
NVD has not supplied machine-readable vulnerable CPE product/version entries for this CVE. This is an information gap, not proof that no products are affected. Check the vendor advisory references below.
Remediation & validation
- Identify exposure by comparing the affected product and version ranges with your asset inventory, SBOM and externally exposed services.
- Review the linked vendor security advisory or patch notes. Upgrade to a vendor-confirmed fixed release; do not infer a fixed version from the CVE description.
- Until patched, consider restricting network access or disabling the affected feature where operationally safe. These are temporary controls, not a substitute for a vendor fix.
- Validate the remediation with a version check and vulnerability rescan, then retain change evidence.
No fixed version is displayed unless it is explicitly established by a vendor advisory. Follow the vendor's release notes for exact product and branch applicability.
Vendor advisories, patches & exploit references
- https://github.com/deepin-community/mtools/blob/16d295331a1cfbcf02ad0b2f03c9b906197cf3ee/vfat.c#L399 VENDOR cve@mitre.org
- https://github.com/deepin-community/mtools/blob/16d295331a1cfbcf02ad0b2f03c9b906197cf3ee/vfat.c#L444-L445 VENDOR cve@mitre.org
- https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00001.html REFERENCE cve@mitre.org
- https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00002.html REFERENCE cve@mitre.org
- https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00004.html REFERENCE cve@mitre.org
- http://www.openwall.com/lists/oss-security/2026/10/31/1 REFERENCE af854a3a-2127-422b-91ae-364da2661108
Information gaps & confidence notes
These gaps indicate missing source data. CVE Watch does not fill them with guessed product, exploit or patch details.
- NVD does not currently provide machine-readable vulnerable CPE product/version entries for this record.
Last enrichment: 2026-11-09T20:31:32+00:00 · Source last modified: 2026-11-09T20:10:00.200