{"id":"CVE-2009-3234","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-3234","generatedAt":"2026-10-27T20:41:54.394Z","title":"Buffer overflow in the perf_copy_attr function in kernel/perf_counter.c in the Linux kernel 2.6.31-rc1 allows local users to cause a denial of service (crash) and execute arbitrary code via a \"big size data\" to the perf_counter_open system call.","description":"Buffer overflow in the perf_copy_attr function in kernel/perf_counter.c in the Linux kernel 2.6.31-rc1 allows local users to cause a denial of service (crash) and execute arbitrary code via a \"big size data\" to the perf_counter_open system call.","published":"2009-09-17T10:30:01.000Z","lastModified":"2026-06-16T23:11:12.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":4.9,"severity":"MEDIUM","vector":"AV:L/AC:L/Au:N/C:N/I:N/A:C"},"cwe":["CWE-119"],"affected":["linux/linux kernel"],"epss":{"score":0.01795,"percentile":0.78283,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2009-09-16","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":33228,"kind":"exploit","title":"Linux Kernel 2.6.31 - 'perf_counter_open()' Local Buffer Overflow","url":"https://www.exploit-db.com/exploits/33228","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/dos/33228.txt","file":"exploits/linux/dos/33228.txt","published":"2009-09-16","added":"2009-09-16","updated":"2014-05-08","author":"Xiao Guangrong","type":"dos","platform":"linux","port":null,"verified":true,"codes":["CVE-2009-3234","OSVDB-58213"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.securityfocus.com/bid/36423/info"}]},"verdict":{"level":"high","text":"A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 1.8%. Treat it as high on anything reachable from the internet."},"changes":[],"references":[{"url":"http://article.gmane.org/gmane.linux.kernel/890654","tags":["Exploit"],"source":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2009/09/16/1","source":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2009/09/17/13","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/36423","source":"cve@mitre.org"},{"url":"http://article.gmane.org/gmane.linux.kernel/890654","tags":["Exploit"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2009/09/16/1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2009/09/17/13","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/36423","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-3234","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."}