CVE-2018-6923

highpriority · track · 31EPSS 0.040 · 90 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

4.01% (90th) EPSS

CVSS 7.8 · high

Is it mine?

41 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.06.9mediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USprimary

affected products (41)

Products and version ranges known to be affected.

FreeBSD FreeBSD≤ All supported versions of FreeBSD.enisa_euvdEU
freebsd freebsd= 10.0nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 11.0nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 11.1nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 11.2nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 2.2nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 3.0nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 4.10nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 4.11nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 4.3nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 4.4nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 4.5nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 4.6nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 4.7nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 4.8nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 4.9nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 5.0nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 5.1nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 5.2nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
freebsd freebsd= 5.3nvdUScpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*

showing 20 of 41

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2018-09-04modified 2026-06-17

related (9,612)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-28318US	—OT critical	43.7% (99th)	KEV	2026-06-04
SolarWinds Serv-U is susceptible to specially crafted POST requests that crash the Serv-U service without authentication using Content-Encoding: deflate. Mitigation steps are provi…
CVE-2026-45498US	high7.5OT critical	63.1% (99th)	KEV	2026-05-20
Microsoft Defender Denial of Service Vulnerability
CVE-2023-44487US	high7.5OT critical	100.0% (100th)	KEV	2023-10-10
The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through…
CVE-2023-38180US	—OT critical	14.1% (97th)	KEV	2023-08-08
.NET and Visual Studio Denial of Service Vulnerability
CVE-2021-44228US	critical10.0OT critical	100.0% (100th)	KEV	2021-12-10
Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect agai…

+9607 more

references (7)

External citations — patches, advisories, analysis.

https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.asc cnnvd
http://www.securityfocus.com/bid/105336 enisa_euvd
http://www.securitytracker.com/id/1041505 enisa_euvd
https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.asc enisa_euvd
http://www.securityfocus.com/bid/105336Third Party AdvisoryVDB Entrynvd
http://www.securitytracker.com/id/1041505Third Party AdvisoryVDB Entrynvd
https://www.freebsd.org/security/advisories/FreeBSD-SA-18:10.ip.ascMitigationVendor Advisorynvd

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan