{"id":"CVE-2006-6730","url":"https://www.cyber-defence.io/tools/cve/CVE-2006-6730","generatedAt":"2026-10-27T18:33:41.934Z","title":"OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev/xf86 device, which allows local users with root privileges to reduce securelevel by replacing the System Management Mode (SMM) handler via a write to an SMRAM…","description":"OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev/xf86 device, which allows local users with root privileges to reduce securelevel by replacing the System Management Mode (SMM) handler via a write to an SMRAM address within /dev/xf86 (aka the video card memory-mapped I/O range), and then launching the new handler via a System Management Interrupt (SMI), as demonstrated by a write to Programmed I/O port 0xB2.","published":"2006-12-26T23:28:00.000Z","lastModified":"2026-06-16T22:33:41.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":6.6,"severity":"MEDIUM","vector":"AV:L/AC:M/Au:S/C:C/I:C/A:C"},"cwe":[],"affected":["netbsd/netbsd","openbsd/openbsd"],"epss":{"score":0.00259,"percentile":0.17408,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.freedesktop.org/archives/xorg/2004-June/000927.html","source":"cve@mitre.org"},{"url":"http://www.cansecwest.com/slides06/csw06-duflot.ppt","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/454379/100/0/threaded","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/454510/100/0/threaded","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/454706/100/0/threaded","source":"cve@mitre.org"},{"url":"http://www.ssi.gouv.fr/fr/sciences/fichiers/lti/cansecwest2006-duflot-paper.pdf","source":"cve@mitre.org"},{"url":"http://lists.freedesktop.org/archives/xorg/2004-June/000927.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.cansecwest.com/slides06/csw06-duflot.ppt","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/454379/100/0/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/454510/100/0/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/454706/100/0/threaded","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ssi.gouv.fr/fr/sciences/fichiers/lti/cansecwest2006-duflot-paper.pdf","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2006-6730","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."}