CVE-2026-118384

MEDIUM

Published Oct 28, 2026 Modified Oct 31, 2026 CWE-839

Description

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

Is your site exposed to CVE-2026-118384?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

6.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

EPSS — Exploit Prediction

0.0032

Probability of exploitation

0.25%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-839 CWE-839

References

Other References

https://github.com/deepin-community/mtools/blob/16d295331a1cfbcf02ad0b2f03c9b906197cf3ee/vfat.c#L399 https://github.com/deepin-community/mtools/blob/16d295331a1cfbcf02ad0b2f03c9b906197cf3ee/vfat.c#L444-L445 https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00001.html https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00002.html https://lists.gnu.org/archive/html/info-mtools/2026-10/msg00004.html http://www.openwall.com/lists/oss-security/2026/10/31/1

Frequently Asked Questions

What is CVE-2026-118384? +

GNU mtools before 4.0.50 has an out-of-bounds write in parse_vses in vfat.c. It has a CVSS v3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2026-118384? +

CVE-2026-118384 has a CVSS v3.1 score of 6.1 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0032, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-118384? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-53176 9.8

In the Linux kernel, the following vulnerability has been resolved: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN In drivers/infiniband/ulp/isert/ib_isert.c, isert_login_recv_done() …

CVE-2026-57186 7.5

Asterisk is an open source private branch exchange and telephony toolkit. From 21.0.0-pre1 until Asterisk 21.12.3, 22.10.1, 23.4.1 and Certified …

CVE-2026-48840 5.3

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values …

Quick Facts

CVSS Score: 6.1
Severity: MEDIUM
EPSS: 0.0032
Published: Oct 28, 2026

Scan for this vulnerability

Check if your website or infrastructure is affected by CVE-2026-118384.

Website Scan Port Scan

Browse CVEs

Critical High CISA KEV ! Most likely exploited →