CVE-2018-17154 — In FreeBSD before 11.2-STABLE(r338987), 11.2-RELEASE-p4, and 11.1-RELEASE-p15, due to insufficient memory checking in the freebsd4_getfsstat system call, a NULL pointer dereference can occur

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MEDIUM

In FreeBSD before 11.2-STABLE(r338987), 11.2-RELEASE-p4, and 11.1-RELEASE-p15, due to insufficient memory checking in the freebsd4_getfsstat system call, a NULL pointer dereference can occur

Published Sep 28, 2018

5.5

MEDIUM

CVSS 3.0

EPSS 0.32%

Description

In FreeBSD before 11.2-STABLE(r338987), 11.2-RELEASE-p4, and 11.1-RELEASE-p15, due to insufficient memory checking in the freebsd4_getfsstat system call, a NULL pointer dereference can occur. Unprivileged authenticated local users may be able to cause a denial of service.

Affected products

Vendor FreeBSD Product FreeBSD Default
n/a
- Version
  11.1 before 11.1-RELEASE-p15
  Status
  affected
  Constraints
  -
- Version
  11.2 before 11.2-RELEASE-p4
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

FreeBSD

n/a

Version	Status	Constraints
11.1 before 11.1-RELEASE-p15	affected	-
11.2 before 11.2-RELEASE-p4	affected	-

Remediation

No remediation recorded yet.

Metrics

0.32% 0.00323

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

EPSS probability 0.00323

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (8 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	0.32% (0.00323)	23.03th	v5 (v2026.06.15)
Sep 20, 2026	0.32% (0.00323)	25.60th	v5 (v2026.06.15)
Jul 20, 2024	0.04% (0.00042)	5.06th	v3 (v2023.03.01)
Mar 7, 2023	0.04% (0.00042)	5.63th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Feb 4, 2022	0.89% (0.00885)	10.50th	v2 (v2022.01.01)
Feb 3, 2022	0.28% (0.00276)	2.66th	v5 (v2026.06.15)
Apr 14, 2021	0.28% (0.00276)	0.00th	v1