No exploitation reported

CVE-2018-6923

No exploitation reported by the sources we read.

Published2018-09-04
WeaknessCWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In FreeBSD before 11.1-STABLE, 11.2-RELEASE-p2, 11.1-RELEASE-p13, ip fragment reassembly code is vulnerable to a denial of service due to excessive system resource consumption. This issue can allow a remote attacker who is able to send an arbitrary ip fragments to cause the machine to consume excessive resources.

Timeline

dates in UTC

2018-09-0418:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-6923?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-6923?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Freebsd

Branch	Affected	Fixed in	Source
2.2	= 2.2	no fix published	NVD
3.0	= 3.0	no fix published	NVD
4.3	= 4.3	no fix published	NVD
4.4	= 4.4	no fix published	NVD
4.5	= 4.5	no fix published	NVD
4.6	= 4.6	no fix published	NVD
4.7	= 4.7	no fix published	NVD
4.8	= 4.8	no fix published	NVD
4.9	= 4.9	no fix published	NVD
4.10	= 4.10	no fix published	NVD
4.11	= 4.11	no fix published	NVD
5.0	= 5.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

www.freebsd.orgMitigation · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.07.8read 2026-10-23
NVDweakness (CWE)CWE-400read 2026-10-23
FIRST EPSSEPSS score4.0 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2018-09-04
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-6923?

Is CVE-2018-6923 actively exploited?

Active exploitation of CVE-2018-6923 has not been confirmed. Its EPSS score was 4.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-6923?

CVE-2018-6923 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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