{"id":"CVE-2018-6916","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-6916","generatedAt":"2026-10-28T23:38:09.359Z","title":"Additionally, a use-after-free vulnerability exists in the IPsec AH handling code.","description":"In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p7, 10.4-STABLE, 10.4-RELEASE-p7, and 10.3-RELEASE-p28, the kernel does not properly validate IPsec packets coming from a trusted host. Additionally, a use-after-free vulnerability exists in the IPsec AH handling code. This issue could cause a system crash or other unpredictable results.","published":"2018-03-09T15:29:00.000Z","lastModified":"2026-06-17T02:02:27.000Z","status":"Modified","sourceIdentifier":"secteam@freebsd.org","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":["freebsd/freebsd"],"epss":{"score":0.02086,"percentile":0.81474,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (2.09%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securitytracker.com/id/1040460","tags":["Third Party Advisory","VDB Entry"],"source":"secteam@freebsd.org"},{"url":"https://www.freebsd.org/security/advisories/FreeBSD-SA-18:01.ipsec.asc","tags":["Patch","Vendor Advisory"],"source":"secteam@freebsd.org"},{"url":"http://www.securitytracker.com/id/1040460","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.freebsd.org/security/advisories/FreeBSD-SA-18:01.ipsec.asc","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-6916","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}