CVE-2008-3531 — Stack-based buffer overflow in sys/kern/vfs_mount.c in the kernel in FreeBSD 7.0 and 7.1, when vfs.usermount is enabled, allows local users to gain privileges via a crafted (1) mount or (2) nmount system call, related to copying of "user defined data" in "certain error conditions."

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MEDIUM

Stack-based buffer overflow in sys/kern/vfs_mount.c in the kernel in FreeBSD 7.0 and 7.1, when vfs.usermount is enabled, allows local users to gain privileges via a crafted (1) mount or (2) nmount system call, related to copying of "user defined data" in "certain error conditions."

Published Sep 5, 2008

6.9

MEDIUM

CVSS 2.0

EPSS 1.03%

Description

Stack-based buffer overflow in sys/kern/vfs_mount.c in the kernel in FreeBSD 7.0 and 7.1, when vfs.usermount is enabled, allows local users to gain privileges via a crafted (1) mount or (2) nmount system call, related to copying of "user defined data" in "certain error conditions."

Affected products

Remediation

No remediation recorded yet.

Metrics

1.03% 0.01032

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01032

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (9 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.03% (0.01032)	62.46th	v5 (v2026.06.15)
Jun 15, 2026	1.03% (0.01032)	59.14th	v5 (v2026.06.15)
Mar 17, 2025	0.08% (0.00078)	20.71th	v4 (v2025.03.14)
Dec 12, 2024	0.04% (0.00042)	0.34th	v3 (v2023.03.01)
Mar 7, 2023	0.04% (0.00042)	0.50th	v3 (v2023.03.01)
Mar 6, 2023	1.76% (0.01761)	76.53th	v2 (v2022.01.01)
Feb 23, 2023	1.76% (0.01761)	76.48th	v2 (v2022.01.01)
Apr 1, 2022	1.76% (0.01761)	74.44th	v2 (v2022.01.01)
Feb 4, 2022	1.76% (0.01761)	53.69th	v2 (v2022.01.01)

Weaknesses (1)

CWE-119

Buffer Overflow

References (4)

http://security.FreeBSD.org/advisories/FreeBSD-SA-08:08.nmount.asc
vendor-advisoryx_refsource_FREEBSD
http://www.securityfocus.com/bid/31002
vdb-entryx_refsource_BIDPatch
http://www.securitytracker.com/id?1020816
vdb-entryx_refsource_SECTRACK
https://exchange.xforce.ibmcloud.com/vulnerabilities/45143
vdb-entryx_refsource_XF

Link	Providers	Tags
http://security.FreeBSD.org/advisories/FreeBSD-SA-08:08.nmount.asc		vendor-advisoryx_refsource_FREEBSD
http://www.securityfocus.com/bid/31002		vdb-entryx_refsource_BIDPatch
http://www.securitytracker.com/id?1020816		vdb-entryx_refsource_SECTRACK
https://exchange.xforce.ibmcloud.com/vulnerabilities/45143		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Sep 5, 2008

Updated Aug 7, 2024

Reserved Aug 7, 2008

Link CVE-2008-3531

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2008-3531

Red Hat

Severity n/a

Public date n/a

Links CVE-2008-3531