fs: fuse: buffer overflow vulnerability in the Zephyr FS

published 2024-02-20 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-59085

cvss: 7.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits: 0; none known

Possible buffer overflow in is_mount_point

Patch / fix

links 1

github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-mh67-4h… advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-02-29)

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-mh67-4h3q-p437 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.3	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

zephyrproject-rtos Zephyr

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input

References

github.com /zephyrproject-rtos/zephyr/security/advisories/GHSA-mh67-4h3q-p437
exploit, patch, vendor-advisory

Sources

CVE List CVE-2023-6881
NVD CVE-2023-6881

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary