{"id":"CVE-2013-2094","published":"2013-05-14T20:55:01Z","modified":"2026-06-16T23:52:44Z","title":"Linux Kernel Privilege Escalation Vulnerability","vendor":"Linux","product":"Kernel","tier":"core","eol":null,"description":{"text":"The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows local users to gain privileges via a crafted perf_event_open system call.","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is an incorrect integer data type in the perf_swevent_init function in kernel/events/core.c, which affects the Linux kernel before 3.8.9. An attacker with local access and no required privileges or user interaction can craft a perf_event_open system call to gain elevated privileges.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:10:39Z"},"cvss":{"score":8.4,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.47709,"percentile":0.98844,"date":"2026-10-28","provenance":"source"},"kev":{"dateAdded":"2022-09-15","dueDate":"2022-10-06","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8176cced706b5e5d15887584150764894e94e02f; https://nvd.nist.gov/vuln/detail/CVE-2013-2094","provenance":"source"},"vulncheckKev":{"dateAdded":"2013-05-17","exploitedFirstSeen":"2013-05-17","ransomware":false,"evidence":[{"url":"https://www.linuxglobal.com/cve-2013-2094-root-privilege-escalation-attack/","date":"2013-05-17"},{"url":"https://securelist.com/skygofree-following-in-the-footsteps-of-hackingteam/83603/","date":"2018-01-16"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-09-15"}],"evidenceTotal":3,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-189","name":null}],"references":[{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8176cced706b5e5d15887584150764894e94e02f","tags":["Not Applicable"]},{"url":"http://lists.centos.org/pipermail/centos-announce/2013-May/019729.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.centos.org/pipermail/centos-announce/2013-May/019733.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00008.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00018.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00009.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00017.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lkml.indiana.edu/hypermail/linux/kernel/1304.1/03652.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lkml.indiana.edu/hypermail/linux/kernel/1304.1/03976.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lkml.indiana.edu/hypermail/linux/kernel/1304.1/04302.html","tags":["Third Party Advisory"]},{"url":"http://news.ycombinator.com/item?id=5703758","tags":["Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/121616/semtex.c","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://rhn.redhat.com/errata/RHSA-2013-0830.html","tags":["Third Party Advisory"]},{"url":"http://twitter.com/djrbliss/statuses/334301992648331267","tags":["Patch"]},{"url":"http://www.exploit-db.com/exploits/33589","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.9","tags":["Not Applicable"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2013:176","tags":["Mailing List","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2013/05/14/6","tags":["Mailing List","Third Party Advisory"]},{"url":"http://www.osvdb.org/93361","tags":["Broken Link"]},{"url":"http://www.reddit.com/r/netsec/comments/1eb9iw","tags":["Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1825-1","tags":["Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1826-1","tags":["Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1827-1","tags":["Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1828-1","tags":["Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1836-1","tags":["Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1838-1","tags":["Third Party Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=962792","tags":["Issue Tracking"]},{"url":"https://github.com/torvalds/linux/commit/8176cced706b5e5d15887584150764894e94e02f","tags":["Third Party Advisory"]},{"url":"http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8176cced706b5e5d15887584150764894e94e02f","tags":["Not Applicable"]},{"url":"http://lists.centos.org/pipermail/centos-announce/2013-May/019729.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.centos.org/pipermail/centos-announce/2013-May/019733.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00008.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00018.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00009.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00017.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lkml.indiana.edu/hypermail/linux/kernel/1304.1/03652.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lkml.indiana.edu/hypermail/linux/kernel/1304.1/03976.html","tags":["Third Party Advisory","VDB Entry"]},{"url":"http://lkml.indiana.edu/hypermail/linux/kernel/1304.1/04302.html","tags":["Third Party Advisory"]},{"url":"http://news.ycombinator.com/item?id=5703758","tags":["Third Party 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Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1826-1","tags":["Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1827-1","tags":["Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1828-1","tags":["Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1836-1","tags":["Third Party Advisory"]},{"url":"http://www.ubuntu.com/usn/USN-1838-1","tags":["Third Party Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=962792","tags":["Issue Tracking"]},{"url":"https://github.com/torvalds/linux/commit/8176cced706b5e5d15887584150764894e94e02f","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-2094","tags":["US Government Resource"]}],"techniques":[{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: local privilege escalation via crafted syscall","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows local users to gain privileges via a crafted perf_event_open system call","start":131,"end":210}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2013-2068","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-2068","exploited":true,"exploitedSince":"2022-09-15","provenance":"source"},"exploits":[{"id":25444,"url":"https://www.exploit-db.com/exploits/25444","title":"Linux Kernel 2.6.32 < 3.x (CentOS 5/6) - 'PERF_EVENTS' Local Privilege Escalation (1)","type":"local","platform":"linux","date":"2013-05-14","verified":false,"provenance":"source"},{"id":26131,"url":"https://www.exploit-db.com/exploits/26131","title":"Linux Kernel < 3.8.9 (x86-64) - 'perf_swevent_init' Local Privilege Escalation (2)","type":"local","platform":"linux_x86-64","date":"2013-06-11","verified":true,"provenance":"source"},{"id":33589,"url":"https://www.exploit-db.com/exploits/33589","title":"Linux Kernel 3.2.0-23/3.5.0-23 (Ubuntu 12.04/12.04.1/12.04.2 x64) - 'perf_swevent_init' Local Privilege Escalation (3)","type":"local","platform":"linux_x86-64","date":"2014-05-31","verified":true,"provenance":"source"}],"exploitSources":{"exploitdb":{"count":3,"earliest":"2013-05-14"},"pocGithub":{"count":5,"skipped":2,"earliest":"2013-05-20","earliestUrl":"https://github.com/realtalk/cve-2013-2094","repos":[{"name":"realtalk/cve-2013-2094","url":"https://github.com/realtalk/cve-2013-2094","stars":91,"created":"2013-05-20"},{"name":"hiikezoe/libperf_event_exploit","url":"https://github.com/hiikezoe/libperf_event_exploit","stars":17,"created":"2013-06-05"},{"name":"Pashkela/CVE-2013-2094","url":"https://github.com/Pashkela/CVE-2013-2094","stars":4,"created":"2013-06-16"},{"name":"timhsutw/cve-2013-2094","url":"https://github.com/timhsutw/cve-2013-2094","stars":3,"created":"2015-03-29"},{"name":"vnik5287/CVE-2013-2094","url":"https://github.com/vnik5287/CVE-2013-2094","stars":1,"created":"2019-07-23"}]},"first":{"date":"2013-05-14","source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/25444"},"provenance":"source"},"exploitRefs":["http://packetstormsecurity.com/files/121616/semtex.c","http://www.exploit-db.com/exploits/33589"],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"}],"timeline":[{"date":"2013-05-14","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2013-2094","provenance":"source"},{"date":"2013-05-14","kind":"exploit-public","label":"First public exploit: Exploit-DB (EDB-25444); later: PoC-in-GitHub 2013-05-20","url":"https://www.exploit-db.com/exploits/25444","provenance":"source"},{"date":"2013-05-17","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.linuxglobal.com/cve-2013-2094-root-privilege-escalation-attack/","provenance":"source"},{"date":"2022-09-15","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-09-15","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-2068","provenance":"source"}],"speed":{"daysToPublicExploit":0,"firstExploitFrom":"Exploit-DB","daysToKev":3411},"priority":{"score":68.6,"factors":[{"name":"In a KEV 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