CVE-2020-8647

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "40157F12-F9F5-4A92-A0FA-213D2809B839", "versionEndIncluding": "5.5.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*", "matchCriteriaId": "B620311B-34A3-48A6-82DF-6F078D7A4493", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the vc_do_resize function in drivers/tty/vt/vt.c."}, {"lang": "es", "value": "Se presenta una vulnerabilidad de uso de la memoria previamente liberada en el kernel de Linux versiones hasta 5.5.2 en la funci\u00f3n vc_do_resize en el archivo drivers/tty/vt/vt.c."}], "id": "CVE-2020-8647", "lastModified": "2026-06-17T03:26:42.197", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 3.6, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 4.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-02-06T01:15:10.813", "references": [{"source": "cve@mitre.org", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.html"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Patch", "Vendor Advisory"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=206359"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2020/dsa-4698"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00039.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Patch", "Vendor Advisory"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=206359"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2020/dsa-4698"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2020:4062", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-1160.rt56.1131.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-09-29T00:00:00Z"}, {"advisory": "RHSA-2020:4060", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-1160.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-09-29T00:00:00Z"}, {"advisory": "RHSA-2020:4609", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-240.rt7.54.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-11-04T00:00:00Z"}, {"advisory": "RHSA-2020:4431", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-240.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-11-04T00:00:00Z"}, {"advisory": "RHSA-2022:1209", "cpe": "cpe:/a:redhat:rhel_eus:8.2::nfv", "package": "kernel-rt-0:4.18.0-193.80.1.rt13.130.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2022-04-05T00:00:00Z"}, {"advisory": "RHSA-2022:1213", "cpe": "cpe:/o:redhat:rhel_eus:8.2", "package": "kernel-0:4.18.0-193.80.1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2022-04-05T00:00:00Z"}], "bugzilla": {"description": "kernel: out-of-bounds read in in vc_do_resize function in drivers/tty/vt/vt.c", "id": "1802563", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1802563"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H", "status": "verified"}, "cwe": "CWE-200", "details": ["There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the vc_do_resize function in drivers/tty/vt/vt.c.", "A flaw was found in the Linux kernel\u2019s virtual console resize functionality. An attacker with local access to virtual consoles can use the virtual console resizing code to gather kernel internal data structures."], "mitigation": {"lang": "en:us", "value": "The attack vector can be significantly reduced by preventing users from being able to log into the local virtual console.\nSee the instructions on disabling local login here: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/managing_smart_cards/pam_configuration_files , See the section on \"pam_console\" to deny users logging into the console. This mechanism should work from el6 forward to current versions of Red Hat Enterprise Linux."}, "name": "CVE-2020-8647", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Will not fix", "package_name": "kernel-alt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2020-01-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-8647\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-8647"], "statement": "This flaw is rated as having Moderate impact because the information leak is limited.", "threat_severity": "Moderate"}

{}