{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-21T18:45:58.074","vulnerabilities":[{"cve":{"id":"CVE-2021-20194","sourceIdentifier":"secalert@redhat.com","published":"2021-02-23T23:15:13.100","lastModified":"2024-11-21T05:46:06.407","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"There is a vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly privileges escalation."},{"lang":"es","value":"Se presenta una vulnerabilidad en el kernel de Linux versiones superiores a 5.2 (si el kernel compilado con los parámetros config CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY no se establece y el hook BPF a getsockopt está registrado). Como resultado de la ejecución de BPF, el usuario local puede desencadenar un error en la función __cgroup_bpf_run_filter_getsockopt() que puede conllevar a un desbordamiento de la pila (debido a una copia de usuario no reforzada). El impacto del ataque podría ser la denegación de servicio o posiblemente una escalada de privilegios"}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:P/I:P/A:P","baseScore":4.6,"accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"MEDIUM","exploitabilityScore":3.9,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"secalert@redhat.com","type":"Secondary","description":[{"lang":"en","value":"CWE-20"}]},{"source":"nvd@nist.gov","type":"Secondary","description":[{"lang":"en","value":"CWE-787"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartExcluding":"5.2","matchCriteriaId":"52C57624-28DE-4E03-B6EF-F09CC640D9F0"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:redhat:openshift_container_platform:4.4:*:*:*:*:*:*:*","matchCriteriaId":"44C5E433-229C-4BB9-8481-8A74AFA8DB8E"},{"vulnerable":true,"criteria":"cpe:2.3:a:redhat:openshift_container_platform:4.5:*:*:*:*:*:*:*","matchCriteriaId":"D432C063-0805-4151-A819-508FE8954101"},{"vulnerable":true,"criteria":"cpe:2.3:a:redhat:openshift_container_platform:4.6:*:*:*:*:*:*:*","matchCriteriaId":"6B62E762-2878-455A-93C9-A5DB430D7BB5"},{"vulnerable":true,"criteria":"cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*","matchCriteriaId":"F4CFF558-3C47-480D-A2F0-BABF26042943"}]}]}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1912683","source":"secalert@redhat.com","tags":["Issue Tracking","Patch","Third Party Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20210326-0003/","source":"secalert@redhat.com","tags":["Third Party Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1912683","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Issue Tracking","Patch","Third Party Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20210326-0003/","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]}]}}]}