CVE-2018-6918
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…
- 7.5HighCVSS base score
- 4.2%Exploitation in 30 daysEPSS · top 9.0% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By freebsd
- 51 days later
· 51 days later
Published
- 6 years later
· 6 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 4.2% · top 9.0% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
References
7
- 1040628 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- FreeBSD-SA-18:05 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
- 103666 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://support.apple.com/kb/HT210090 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20190531 APPLE-SA-2019-5-30-1 AirPort Base Station Firmware Update 7.9.1 (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20190611 APPLE-SA-2019-5-30-1 AirPort Base Station Firmware Update 7.9.1 (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- https://support.apple.com/kb/HT210091 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2018-18662 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2018-6918)Record last updated .