{"id":"CVE-2012-0055","url":"https://www.cyber-defence.io/tools/cve/CVE-2012-0055","generatedAt":"2026-10-27T22:04:30.095Z","title":"OverlayFS in the Linux kernel before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10, is missing inode security checks which could allow attackers to bypass security restrictions and perform unauthorized actions.","description":"OverlayFS in the Linux kernel before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10, is missing inode security checks which could allow attackers to bypass security restrictions and perform unauthorized actions.","published":"2020-02-19T18:15:10.000Z","lastModified":"2026-06-16T23:36:35.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-862"],"affected":["linux/linux kernel","canonical/ubuntu linux"],"epss":{"score":0.01241,"percentile":0.6898,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2012-01-17","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":36571,"kind":"exploit","title":"OverlayFS inode Security Checks - 'inode.c' Local Security Bypass","url":"https://www.exploit-db.com/exploits/36571","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/local/36571.sh","file":"exploits/linux/local/36571.sh","published":"2012-01-17","added":"2012-01-17","updated":"2015-03-31","author":"Gary Poster","type":"local","platform":"linux","port":null,"verified":true,"codes":["CVE-2012-0055","OSVDB-79247"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.securityfocus.com/bid/51529/info"}]},"verdict":{"level":"urgent","text":"A public exploit is published in Exploit-DB (verified) and the impact is high, while EPSS rates exploitation at 1.2%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use."},"changes":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2012/01/17/11","tags":["Exploit","Mailing List","Patch","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1363-1","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1364-1","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1384-1","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/cve-2012-0055","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://bugs.launchpad.net/ubuntu/+source/linux/+bug/915941","tags":["Exploit","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-0055","tags":["Issue Tracking","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2012/01/17/11","tags":["Exploit","Mailing List","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1363-1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1364-1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1384-1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/security/cve/cve-2012-0055","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.launchpad.net/ubuntu/+source/linux/+bug/915941","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-0055","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2012-0055","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."}