{"api_version":"1","generated_at":"2026-07-23T10:25:21+00:00","cve":"CVE-2019-5023","urls":{"html":"https://cve.report/CVE-2019-5023","api":"https://cve.report/api/cve/CVE-2019-5023.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2019-5023","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-5023"},"summary":{"title":"CVE-2019-5023","description":"An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability.","state":"PUBLIC","assigner":"talos-cna@cisco.com","published_at":"2019-10-31 21:15:00","updated_at":"2022-06-07 18:41:00"},"problem_types":["CWE-772"],"metrics":[],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784","name":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784","refsource":"MISC","tags":["Exploit","Third Party Advisory"],"title":"TALOS-2019-0784 ||  Cisco Talos Intelligence Group - Comprehensive Threat Intelligence","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-5023","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-5023","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2019","cve_id":"5023","vulnerable":"1","versionEndIncluding":"3.1-4.9.24-201704252333","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"gresecurity","cpe5":"gresecurity","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"official","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2019","cve_id":"5023","vulnerable":"1","versionEndIncluding":"4.9.74","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"gresecurity","cpe5":"gresecurity","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"unofficial","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2019","cve_id":"5023","vulnerable":"1","versionEndIncluding":"pax-linux-4.9.8-test7","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"gresecurity","cpe5":"pax","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2019","cve_id":"5023","vulnerable":"1","versionEndIncluding":"3.1-4.9.24-201704252333","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"opensrcsec","cpe5":"grsecurity","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"official","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2019","cve_id":"5023","vulnerable":"1","versionEndIncluding":"4.9.74","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"opensrcsec","cpe5":"grsecurity","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"unofficial","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2019","cve_id":"5023","vulnerable":"1","versionEndIncluding":"pax-linux-4.9.8-test7","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"opensrcsec","cpe5":"pax","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2019-5023","ASSIGNER":"talos-cna@cisco.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"PaX","version":{"version_data":[{"version_value":"PaX pax-linux-4.9.24-test7.patch (latest version available to the public) grsecurity grsecurity-3.1-4.9.24-201704252333.patch (latest official version available to the public) v4.9.74-unofficial_grsec (latest unofficial version available to the public)"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-401: Improper Release of Memory Before Removing Last Reference"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784","url":"https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784"}]},"description":{"description_data":[{"lang":"eng","value":"An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability."}]},"impact":{"cvss":{"baseScore":5.9,"baseSeverity":"Medium","vectorString":"CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.0"}}},"nvd":{"publishedDate":"2019-10-31 21:15:00","lastModifiedDate":"2022-06-07 18:41:00","problem_types":["CWE-772"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.2,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:N/A:P","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"PARTIAL","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:opensrcsec:grsecurity:*:*:*:*:official:*:*:*","versionStartIncluding":"3.1-4.9.8-201702060653","versionEndIncluding":"3.1-4.9.24-201704252333","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:opensrcsec:grsecurity:*:*:*:*:unofficial:*:*:*","versionStartIncluding":"4.9.25","versionEndIncluding":"4.9.74","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:opensrcsec:pax:*:*:*:*:*:*:*:*","versionStartIncluding":"pax-linux-4.9.8-test1","versionEndIncluding":"pax-linux-4.9.8-test7","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2019","CveId":"5023","Ordinal":"142639","Title":"CVE-2019-5023","CVE":"CVE-2019-5023","Year":"2019"},"notes":[{"CveYear":"2019","CveId":"5023","Ordinal":"1","NoteData":"An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability.","Type":"Description","Title":null},{"CveYear":"2019","CveId":"5023","Ordinal":"2","NoteData":"2019-10-31","Type":"Other","Title":"Published"},{"CveYear":"2019","CveId":"5023","Ordinal":"3","NoteData":"2019-10-31","Type":"Other","Title":"Modified"}]}}}