CVE-2026-118384

Quick assessment

Affected

GNU mtools

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GNU mtools 4.0.49 及更早版本在文件的函数中存在越界写入漏洞。

CVSS 6.1 · Medium EPSS 0.32% · P25 Updated Oct 28, 2026

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

Vendor	Product	Version Range	Status
GNU	mtools	`≤ 4.0.49`	affected

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Vulnerability Information

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Vulnerability Title

N/A

Source: CVE Program / CVE List V5

Vulnerability Description

GNU mtools through 4.0.49 has an out-of-bounds write in parse_vses in vfat.c.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

未进行最小值检查的数值范围比较

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
GNU	mtools	0 ~ 4.0.49	-

II. Public POCs for CVE-2026-118384

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-118384

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Other References for CVE-2026-118384 (1)

https://ftp.gnu.org/gnu/mtools/mtools-4.0.49.tar.gz product

https://www.cve.org/CVERecord?id=CVE-2026-118384

IV. Related Vulnerabilities

Same vendor: GNU

Same weakness: CWE-839