{"id":"CVE-2012-4565","url":"https://www.cyber-defence.io/tools/cve/CVE-2012-4565","generatedAt":"2026-10-27T19:43:23.486Z","title":"The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel before 3.4.19, when the net.ipv4.tcp_congestion_control illinois setting is enabled, allows local users to cause a denial of service (divide-by-zero error and OOPS) by reading…","description":"The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel before 3.4.19, when the net.ipv4.tcp_congestion_control illinois setting is enabled, allows local users to cause a denial of service (divide-by-zero error and OOPS) by reading TCP stats.","published":"2012-12-21T11:47:37.000Z","lastModified":"2026-06-16T23:45:25.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":4.7,"severity":"MEDIUM","vector":"AV:L/AC:M/Au:N/C:N/I:N/A:C"},"cwe":["CWE-189"],"affected":["linux/linux kernel"],"epss":{"score":0.00486,"percentile":0.4161,"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 (0.49%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664","source":"secalert@redhat.com"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091110.html","source":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2012-1580.html","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/51409","source":"secalert@redhat.com"},{"url":"http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.19","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2012/10/31/5","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/56346","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1644-1","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1645-1","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1646-1","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1647-1","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1648-1","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1649-1","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1650-1","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1651-1","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-1652-1","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=871848","source":"secalert@redhat.com"},{"url":"https://github.com/torvalds/linux/commit/8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664","tags":["Exploit"],"source":"secalert@redhat.com"},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091110.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2012-1580.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/51409","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.19","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2012/10/31/5","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/56346","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1644-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1645-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1646-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1647-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1648-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1649-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1650-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1651-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1652-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=871848","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/torvalds/linux/commit/8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2012-4565","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."}