CVE-2018-6918

7.5 highEPSS 4.2%

In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p9, 10.4-STABLE, 10.4-RELEASE-p8 and 10.3-RELEASE-p28, the length field of the ipsec option header does not count the size of the option header itself, causing an infinite loop when the length is zero. This issue can allow a remote attacker who is able to send an arbitrary packet to cause the machine to crash.

Severity

CVSS 3.0

7.5 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 4.2% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
CWE: CWE-835
Published: 2018-04-04
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

freebsd:freebsd

References

http://seclists.org/fulldisclosure/2019/Jun/6
http://www.securityfocus.com/bid/103666
http://www.securitytracker.com/id/1040628
https://seclists.org/bugtraq/2019/May/77
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:05.ipsec.asc

Check your stack JSON