{"api_version":"1","generated_at":"2026-07-23T21:10:27+00:00","cve":"CVE-2016-6309","urls":{"html":"https://cve.report/CVE-2016-6309","api":"https://cve.report/api/cve/CVE-2016-6309.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2016-6309","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-6309"},"summary":{"title":"CVE-2016-6309","description":"statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote attackers to cause a denial of service (use-after-free) or possibly execute arbitrary code via a crafted TLS session.","state":"PUBLISHED","assigner":"redhat","published_at":"2016-09-26 19:59:06","updated_at":"2026-05-06 22:30:45"},"problem_types":["CWE-416","n/a"],"metrics":[{"version":"3.0","source":"nvd@nist.gov","type":"Primary","score":"9.8","severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"2.0","source":"nvd@nist.gov","type":"Primary","score":"10","severity":"","vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","data":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:C/I:C/A:C","baseScore":10,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE"}}],"references":[{"url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us","name":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"Document Display | HPE Support Center","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html","name":"http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"Oracle Critical Patch Update - October 2016","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://bto.bluecoat.com/security-advisory/sa132","name":"https://bto.bluecoat.com/security-advisory/sa132","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"SA132 : OpenSSL Vulnerabilities 22-Sep-2016 and 26-Sep-2016","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.openssl.org/news/secadv/20160926.txt","name":"https://www.openssl.org/news/secadv/20160926.txt","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"title":"","mime":"text/plain","httpstatus":"200","archivestatus":"200"},{"url":"https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb","name":"https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"git.openssl.org Git - openssl.git/commit","mime":"text/xml","httpstatus":"404","archivestatus":"200"},{"url":"http://www.securitytracker.com/id/1036885","name":"http://www.securitytracker.com/id/1036885","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"OpenSSL Multiple Bugs Let Remote Users Cause the Target Service to Crash - SecurityTracker","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.securityfocus.com/bid/93177","name":"http://www.securityfocus.com/bid/93177","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"OpenSSL CVE-2016-6309 Remote Code Execution Vulnerability","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759","name":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"Juniper Networks - 2016-10 Security Bulletin: OpenSSL security updates","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html","name":"http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"Oracle Critical Patch Update - January 2018","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html","name":"http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"Oracle Critical Patch Update - April 2018","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21995039","name":"http://www-01.ibm.com/support/docview.wss?uid=swg21995039","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"IBM Security Bulletin: Vulnerabilities in OpenSSL, OpenVPN and  GNU glibc affect IBM Security Virtual Server Protection for VMware - United States","mime":"text/html","httpstatus":"404","archivestatus":"200"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html","name":"http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"Oracle Critical Patch Update - July 2017","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.tenable.com/security/tns-2016-20","name":"https://www.tenable.com/security/tns-2016-20","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"[R2] PVS 5.2.0 Fixes Multiple Third-party Library Vulnerabilities - Security Advisory | Tenable Network Security","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.tenable.com/security/tns-2016-16","name":"https://www.tenable.com/security/tns-2016-16","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"[R5] Nessus 6.9 Fixes Multiple Vulnerabilities - Security Advisory | Tenable Network Security","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://git.openssl.org/?p=openssl.git;a=commit;h=acacbfa7565c78d2273c0b2a2e5e803f44afefeb","name":"CONFIRM:https://git.openssl.org/?p=openssl.git;a=commit;h=acacbfa7565c78d2273c0b2a2e5e803f44afefeb","refsource":"MITRE","tags":[],"title":"git.openssl.org Git - openssl.git/commit","mime":"text/xml","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-6309","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-6309","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"n/a","product":"n/a","version":"affected n/a","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2016","cve_id":"6309","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"openssl","cpe5":"openssl","cpe6":"1.1.0a","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2016","cve_id":"6309","cve":"CVE-2016-6309","epss":"0.282120000","percentile":"0.965230000","score_date":"2026-05-07","updated_at":"2026-05-08 00:14:43"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2024-08-06T01:29:18.440Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://www.tenable.com/security/tns-2016-20"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://www.openssl.org/news/secadv/20160926.txt"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21995039"},{"name":"1036885","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"],"url":"http://www.securitytracker.com/id/1036885"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://www.tenable.com/security/tns-2016-16"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb"},{"name":"93177","tags":["vdb-entry","x_refsource_BID","x_transferred"],"url":"http://www.securityfocus.com/bid/93177"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://bto.bluecoat.com/security-advisory/sa132"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759"}],"title":"CVE Program Container"}],"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"datePublic":"2016-09-22T00:00:00.000Z","descriptions":[{"lang":"en","value":"statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote attackers to cause a denial of service (use-after-free) or possibly execute arbitrary code via a crafted TLS session."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2018-07-11T09:57:01.000Z","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","shortName":"redhat"},"references":[{"tags":["x_refsource_CONFIRM"],"url":"https://www.tenable.com/security/tns-2016-20"},{"tags":["x_refsource_CONFIRM"],"url":"http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"},{"tags":["x_refsource_CONFIRM"],"url":"https://www.openssl.org/news/secadv/20160926.txt"},{"tags":["x_refsource_CONFIRM"],"url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us"},{"tags":["x_refsource_CONFIRM"],"url":"http://www-01.ibm.com/support/docview.wss?uid=swg21995039"},{"name":"1036885","tags":["vdb-entry","x_refsource_SECTRACK"],"url":"http://www.securitytracker.com/id/1036885"},{"tags":["x_refsource_CONFIRM"],"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html"},{"tags":["x_refsource_CONFIRM"],"url":"https://www.tenable.com/security/tns-2016-16"},{"tags":["x_refsource_CONFIRM"],"url":"https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb"},{"name":"93177","tags":["vdb-entry","x_refsource_BID"],"url":"http://www.securityfocus.com/bid/93177"},{"tags":["x_refsource_CONFIRM"],"url":"http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"},{"tags":["x_refsource_CONFIRM"],"url":"https://bto.bluecoat.com/security-advisory/sa132"},{"tags":["x_refsource_CONFIRM"],"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html"},{"tags":["x_refsource_CONFIRM"],"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"secalert@redhat.com","ID":"CVE-2016-6309","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote attackers to cause a denial of service (use-after-free) or possibly execute arbitrary code via a crafted TLS session."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://www.tenable.com/security/tns-2016-20","refsource":"CONFIRM","url":"https://www.tenable.com/security/tns-2016-20"},{"name":"http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html","refsource":"CONFIRM","url":"http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"},{"name":"https://www.openssl.org/news/secadv/20160926.txt","refsource":"CONFIRM","url":"https://www.openssl.org/news/secadv/20160926.txt"},{"name":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us","refsource":"CONFIRM","url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us"},{"name":"http://www-01.ibm.com/support/docview.wss?uid=swg21995039","refsource":"CONFIRM","url":"http://www-01.ibm.com/support/docview.wss?uid=swg21995039"},{"name":"1036885","refsource":"SECTRACK","url":"http://www.securitytracker.com/id/1036885"},{"name":"http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html","refsource":"CONFIRM","url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html"},{"name":"https://www.tenable.com/security/tns-2016-16","refsource":"CONFIRM","url":"https://www.tenable.com/security/tns-2016-16"},{"name":"https://git.openssl.org/?p=openssl.git;a=commit;h=acacbfa7565c78d2273c0b2a2e5e803f44afefeb","refsource":"CONFIRM","url":"https://git.openssl.org/?p=openssl.git;a=commit;h=acacbfa7565c78d2273c0b2a2e5e803f44afefeb"},{"name":"93177","refsource":"BID","url":"http://www.securityfocus.com/bid/93177"},{"name":"http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html","refsource":"CONFIRM","url":"http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"},{"name":"https://bto.bluecoat.com/security-advisory/sa132","refsource":"CONFIRM","url":"https://bto.bluecoat.com/security-advisory/sa132"},{"name":"http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html","refsource":"CONFIRM","url":"http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html"},{"name":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759","refsource":"CONFIRM","url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759"}]}}}},"cveMetadata":{"assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","assignerShortName":"redhat","cveId":"CVE-2016-6309","datePublished":"2016-09-26T19:00:00.000Z","dateReserved":"2016-07-26T00:00:00.000Z","dateUpdated":"2024-08-06T01:29:18.440Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"},"nvd":{"publishedDate":"2016-09-26 19:59:06","lastModifiedDate":"2026-05-06 22:30:45","problem_types":["CWE-416","n/a"],"metrics":{"cvssMetricV30":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.0","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:C/I:C/A:C","baseScore":10,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE"},"baseSeverity":"HIGH","exploitabilityScore":10,"impactScore":10,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:openssl:openssl:1.1.0a:*:*:*:*:*:*:*","matchCriteriaId":"C9D7A18A-116B-4F68-BEA3-A4E9DDDA55C6"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2016","CveId":"6309","Ordinal":"1","Title":"CVE-2016-6309","CVE":"CVE-2016-6309","Year":"2016"},"notes":[{"CveYear":"2016","CveId":"6309","Ordinal":"1","NoteData":"statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote attackers to cause a denial of service (use-after-free) or possibly execute arbitrary code via a crafted TLS session.","Type":"Description","Title":"CVE-2016-6309"},{"CveYear":"2016","CveId":"6309","Ordinal":"2","NoteData":"2016-09-26","Type":"Other","Title":"Published"},{"CveYear":"2016","CveId":"6309","Ordinal":"3","NoteData":"2018-07-11","Type":"Other","Title":"Modified"}]}}}