{"id":"RHSA-2021:5241","summary":"Red Hat Security Advisory: kernel-rt security and bug fix update","modified":"2026-06-29T10:38:56Z","published":"2024-09-13T22:46:39Z","upstream":["CVE-2021-20321"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2021:5241"},{"type":"ARTICLE","url":"https://access.redhat.com/security/updates/classification/#moderate"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2013242"},{"type":"ADVISORY","url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_5241.json"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2021-20321"},{"type":"ADVISORY","url":"https://www.cve.org/CVERecord?id=CVE-2021-20321"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20321"},{"type":"ARTICLE","url":"https://lore.kernel.org/all/20211011134508.748956131@linuxfoundation.org/"}],"affected":[{"package":{"name":"kernel-rt","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-core","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-debug"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-core","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-debug-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-debuginfo","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-debug-debuginfo"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-devel","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-debug-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-kvm","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-debug-kvm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-modules","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-debug-modules"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-modules-extra","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-debug-modules-extra"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debuginfo","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-debuginfo"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debuginfo-common-x86_64","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-debuginfo-common-x86_64"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-devel","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-kvm","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-kvm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-modules","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-modules"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-modules-extra","ecosystem":"Red Hat:enterprise_linux:8::nfv","purl":"pkg:rpm/redhat/kernel-rt-modules-extra"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-core","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-debug"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-core","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-debug-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-debuginfo","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-debug-debuginfo"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-devel","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-debug-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-modules","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-debug-modules"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debug-modules-extra","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-debug-modules-extra"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debuginfo","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-debuginfo"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-debuginfo-common-x86_64","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-debuginfo-common-x86_64"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-devel","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-modules","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-modules"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}},{"package":{"name":"kernel-rt-modules-extra","ecosystem":"Red Hat:enterprise_linux:8::realtime","purl":"pkg:rpm/redhat/kernel-rt-modules-extra"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:4.18.0-348.7.1.rt7.137.el8_5"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2021:5241.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}