{"api_version":"1","generated_at":"2026-04-23T04:10:33+00:00","cve":"CVE-2020-14311","urls":{"html":"https://cve.report/CVE-2020-14311","api":"https://cve.report/api/cve/CVE-2020-14311.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-14311","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-14311"},"summary":{"title":"CVE-2020-14311","description":"There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.","state":"PUBLIC","assigner":"secalert@redhat.com","published_at":"2020-07-31 22:15:00","updated_at":"2023-11-07 03:17:00"},"problem_types":["CWE-190","CWE-122"],"metrics":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2021/09/21/1","name":"[oss-security] 20210920 Re: Containers-optimized OS (COS) membership in the linux-distros list","refsource":"MLIST","tags":[],"title":"oss-security - Re: Containers-optimized OS (COS) membership in the\n linux-distros list","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"http://www.openwall.com/lists/oss-security/2021/09/17/4","name":"[oss-security] 20210917 Re: Containers-optimized OS (COS) membership in the linux-distros list","refsource":"MLIST","tags":[],"title":"oss-security - Re: Containers-optimized OS (COS) membership in the linux-distros list","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311","name":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311","refsource":"CONFIRM","tags":["Issue Tracking","Third Party Advisory"],"title":"1852014 – (CVE-2020-14311) CVE-2020-14311 grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html","name":"openSUSE-SU-2020:1168","refsource":"SUSE","tags":[],"title":"[security-announce] openSUSE-SU-2020:1168-1: important: Security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html","name":"openSUSE-SU-2020:1169","refsource":"SUSE","tags":[],"title":"[security-announce] openSUSE-SU-2020:1169-1: important: Security update","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://security.gentoo.org/glsa/202104-05","name":"GLSA-202104-05","refsource":"GENTOO","tags":[],"title":"GRUB: Multiple vulnerabilities (GLSA 202104-05) — Gentoo security","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://usn.ubuntu.com/4432-1/","name":"USN-4432-1","refsource":"UBUNTU","tags":[],"title":"USN-4432-1: GRUB 2 vulnerabilities | Ubuntu security notices | Ubuntu","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://www.openwall.com/lists/oss-security/2021/09/17/2","name":"[oss-security] 20210916 Containers-optimized OS (COS) membership in the linux-distros list","refsource":"MLIST","tags":[],"title":"oss-security - Containers-optimized OS (COS) membership in the linux-distros list","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-14311","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-14311","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"14.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"esm","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"16.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"esm","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"18.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"canonical","cpe5":"ubuntu_linux","cpe6":"20.04","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"lts","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"gnu","cpe5":"grub2","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"gnu","cpe5":"grub2","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"leap","cpe6":"15.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"opensuse","cpe5":"leap","cpe6":"15.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux","cpe6":"7.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux","cpe6":"8.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux","cpe6":"7.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux","cpe6":"8.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux_eus","cpe6":"8.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux_eus","cpe6":"8.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux_eus","cpe6":"8.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux_eus","cpe6":"8.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux_server_aus","cpe6":"8.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux_server_aus","cpe6":"8.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux_server_tus","cpe6":"8.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"14311","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"redhat","cpe5":"enterprise_linux_server_tus","cpe6":"8.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-14311","qid":"377345","title":"Alibaba Cloud Linux Security Update for grub2 (ALINUX3-SA-2022:0064)"},{"cve":"CVE-2020-14311","qid":"377367","title":"Alibaba Cloud Linux Security Update for grub2 (ALINUX3-SA-2021:0026)"},{"cve":"CVE-2020-14311","qid":"377533","title":"Alibaba Cloud Linux Security Update for grub2 (ALINUX2-SA-2020:0108)"},{"cve":"CVE-2020-14311","qid":"502730","title":"Alpine Linux Security Update for grub"},{"cve":"CVE-2020-14311","qid":"710015","title":"Gentoo Linux GRUB Multiple Vulnerabilities (GLSA 202104-05)"},{"cve":"CVE-2020-14311","qid":"900056","title":"CBL-Mariner Linux Security Update for grub2 2.06~rc1"},{"cve":"CVE-2020-14311","qid":"901677","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for grub2 (6459-1)"},{"cve":"CVE-2020-14311","qid":"903552","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for grub2 (2557)"},{"cve":"CVE-2020-14311","qid":"905793","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for grub2 (2557-1)"},{"cve":"CVE-2020-14311","qid":"906281","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for grub2 (6459-2)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2020-14311","ASSIGNER":"secalert@redhat.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"The Grub2 Project","product":{"product_data":[{"product_name":"grub2","version":{"version_data":[{"version_value":"2.06"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-190"}]},{"description":[{"lang":"eng","value":"CWE-122"}]}]},"references":{"reference_data":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311","name":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311","refsource":"CONFIRM"},{"refsource":"UBUNTU","name":"USN-4432-1","url":"https://usn.ubuntu.com/4432-1/"},{"refsource":"SUSE","name":"openSUSE-SU-2020:1169","url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html"},{"refsource":"SUSE","name":"openSUSE-SU-2020:1168","url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html"},{"refsource":"GENTOO","name":"GLSA-202104-05","url":"https://security.gentoo.org/glsa/202104-05"},{"refsource":"MLIST","name":"[oss-security] 20210916 Containers-optimized OS (COS) membership in the linux-distros list","url":"http://www.openwall.com/lists/oss-security/2021/09/17/2"},{"refsource":"MLIST","name":"[oss-security] 20210917 Re: Containers-optimized OS (COS) membership in the linux-distros list","url":"http://www.openwall.com/lists/oss-security/2021/09/17/4"},{"refsource":"MLIST","name":"[oss-security] 20210920 Re: Containers-optimized OS (COS) membership in the linux-distros list","url":"http://www.openwall.com/lists/oss-security/2021/09/21/1"}]},"description":{"description_data":[{"lang":"eng","value":"There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow."}]},"impact":{"cvss":[[{"vectorString":"5.7/CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H","version":"3.0"}]]}},"nvd":{"publishedDate":"2020-07-31 22:15:00","lastModifiedDate":"2023-11-07 03:17:00","problem_types":["CWE-190","CWE-122"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":6,"baseSeverity":"MEDIUM"},"exploitabilityScore":0.8,"impactScore":5.2},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:N/I:P/A:P","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":3.6},"severity":"LOW","exploitabilityScore":3.9,"impactScore":4.9,"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:gnu:grub2:*:*:*:*:*:*:*:*","versionEndExcluding":"2.06","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux_eus:8.2:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux_server_tus:8.2:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:redhat:enterprise_linux_server_aus:8.2:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"14311","Ordinal":"175541","Title":"CVE-2020-14311","CVE":"CVE-2020-14311","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"14311","Ordinal":"1","NoteData":"There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"14311","Ordinal":"2","NoteData":"2020-07-31","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"14311","Ordinal":"3","NoteData":"2021-09-21","Type":"Other","Title":"Modified"}]}}}