{"api_version":"1","generated_at":"2026-04-22T21:38:59+00:00","cve":"CVE-2021-43056","urls":{"html":"https://cve.report/CVE-2021-43056","api":"https://cve.report/api/cve/CVE-2021-43056.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-43056","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-43056"},"summary":{"title":"CVE-2021-43056","description":"An issue was discovered in the Linux kernel for powerpc before 5.14.15. It allows a malicious KVM guest to crash the host, when the host is running on Power8, due to an arch/powerpc/kvm/book3s_hv_rmhandlers.S implementation bug in the handling of the SRR1 register values.","state":"PUBLIC","assigner":"cve@mitre.org","published_at":"2021-10-28 04:15:00","updated_at":"2023-11-07 03:39:00"},"problem_types":["NVD-CWE-noinfo"],"metrics":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2021/10/28/1","name":"[oss-security] 20211028 Re: Linux kernel: powerpc: KVM guest can trigger host crash on Power8","refsource":"MLIST","tags":[],"title":"oss-security - Re: Linux kernel: powerpc: KVM guest can trigger host\n crash on Power8","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AA7EAPPKWG4LMTQQLNNSKATY6ST2KQFE/","name":"FEDORA-2021-4fed2b55c4","refsource":"","tags":[],"title":"[SECURITY] Fedora 33 Update: kernel-5.14.15-100.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://git.kernel.org/linus/cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337","name":"https://git.kernel.org/linus/cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337","refsource":"MISC","tags":[],"title":"kernel/git/torvalds/linux.git - Linux kernel source tree","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RRAIS3PG4EV5WFLYESR6FXWM4BJJGWVA/","name":"FEDORA-2021-ed8c2e1098","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 35 Update: kernel-5.14.15-300.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AA7EAPPKWG4LMTQQLNNSKATY6ST2KQFE/","name":"FEDORA-2021-4fed2b55c4","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 33 Update: kernel-5.14.15-100.fc33 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lore.kernel.org/linuxppc-dev/87pmrtbbdt.fsf@mpe.ellerman.id.au/T/#u","name":"https://lore.kernel.org/linuxppc-dev/87pmrtbbdt.fsf@mpe.ellerman.id.au/T/#u","refsource":"MISC","tags":[],"title":"Linux kernel: powerpc: KVM guest can trigger host crash on Power8","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BBM4FP3IT3JZ2O7EBS7TEOG657N4ZGRE/","name":"FEDORA-2021-4320606094","refsource":"","tags":[],"title":"[SECURITY] Fedora 34 Update: kernel-5.14.15-200.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15","name":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15","refsource":"MISC","tags":[],"title":"","mime":"text/plain","httpstatus":"200","archivestatus":"200"},{"url":"https://lore.kernel.org/linuxppc-dev/87pmrtbbdt.fsf%40mpe.ellerman.id.au/T/#u","name":"https://lore.kernel.org/linuxppc-dev/87pmrtbbdt.fsf%40mpe.ellerman.id.au/T/#u","refsource":"","tags":[],"title":"Linux kernel: powerpc: KVM guest can trigger host crash on Power8","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BBM4FP3IT3JZ2O7EBS7TEOG657N4ZGRE/","name":"FEDORA-2021-4320606094","refsource":"FEDORA","tags":[],"title":"[SECURITY] Fedora 34 Update: kernel-5.14.15-200.fc34 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RRAIS3PG4EV5WFLYESR6FXWM4BJJGWVA/","name":"FEDORA-2021-ed8c2e1098","refsource":"","tags":[],"title":"[SECURITY] Fedora 35 Update: kernel-5.14.15-300.fc35 - package-announce - Fedora Mailing-Lists","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-43056","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43056","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"43056","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"33","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"43056","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"34","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"43056","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"fedoraproject","cpe5":"fedora","cpe6":"35","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"43056","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-43056","qid":"159825","title":"Oracle Enterprise Linux Security Update for kernel (ELSA-2022-1988)"},{"cve":"CVE-2021-43056","qid":"179695","title":"Debian Security Update for linux (CVE-2021-43056)"},{"cve":"CVE-2021-43056","qid":"198569","title":"Ubuntu Security Notification for Linux kernel (OEM 5.10) Vulnerabilities (USN-5139-1)"},{"cve":"CVE-2021-43056","qid":"198589","title":"Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5165-1)"},{"cve":"CVE-2021-43056","qid":"198618","title":"Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5210-1)"},{"cve":"CVE-2021-43056","qid":"198621","title":"Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-5208-1)"},{"cve":"CVE-2021-43056","qid":"198627","title":"Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5218-1)"},{"cve":"CVE-2021-43056","qid":"240298","title":"Red Hat Update for kernel security (RHSA-2022:1988)"},{"cve":"CVE-2021-43056","qid":"282035","title":"Fedora Security Update for kernel (FEDORA-2021-4320606094)"},{"cve":"CVE-2021-43056","qid":"282036","title":"Fedora Security Update for kernel (FEDORA-2021-4fed2b55c4)"},{"cve":"CVE-2021-43056","qid":"751336","title":"OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:1460-1)"},{"cve":"CVE-2021-43056","qid":"751342","title":"OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3641-1)"},{"cve":"CVE-2021-43056","qid":"751346","title":"OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3655-1)"},{"cve":"CVE-2021-43056","qid":"751349","title":"OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:1477-1)"},{"cve":"CVE-2021-43056","qid":"751353","title":"OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:3675-1)"},{"cve":"CVE-2021-43056","qid":"940517","title":"AlmaLinux Security Update for kernel (ALSA-2022:1988)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2021-43056","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"An issue was discovered in the Linux kernel for powerpc before 5.14.15. It allows a malicious KVM guest to crash the host, when the host is running on Power8, due to an arch/powerpc/kvm/book3s_hv_rmhandlers.S implementation bug in the handling of the SRR1 register values."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://git.kernel.org/linus/cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337","refsource":"MISC","name":"https://git.kernel.org/linus/cdeb5d7d890e14f3b70e8087e745c4a6a7d9f337"},{"url":"https://lore.kernel.org/linuxppc-dev/87pmrtbbdt.fsf@mpe.ellerman.id.au/T/#u","refsource":"MISC","name":"https://lore.kernel.org/linuxppc-dev/87pmrtbbdt.fsf@mpe.ellerman.id.au/T/#u"},{"url":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15","refsource":"MISC","name":"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15"},{"refsource":"MLIST","name":"[oss-security] 20211028 Re: Linux kernel: powerpc: KVM guest can trigger host crash on Power8","url":"http://www.openwall.com/lists/oss-security/2021/10/28/1"},{"refsource":"FEDORA","name":"FEDORA-2021-4320606094","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BBM4FP3IT3JZ2O7EBS7TEOG657N4ZGRE/"},{"refsource":"FEDORA","name":"FEDORA-2021-ed8c2e1098","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RRAIS3PG4EV5WFLYESR6FXWM4BJJGWVA/"},{"refsource":"FEDORA","name":"FEDORA-2021-4fed2b55c4","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AA7EAPPKWG4LMTQQLNNSKATY6ST2KQFE/"}]}},"nvd":{"publishedDate":"2021-10-28 04:15:00","lastModifiedDate":"2023-11-07 03:39:00","problem_types":["NVD-CWE-noinfo"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM"},"exploitabilityScore":1.8,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:N/I:N/A:C","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"COMPLETE","baseScore":4.9},"severity":"MEDIUM","exploitabilityScore":3.9,"impactScore":6.9,"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:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.4.15","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"43056","Ordinal":"219585","Title":"CVE-2021-43056","CVE":"CVE-2021-43056","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"43056","Ordinal":"1","NoteData":"An issue was discovered in the Linux kernel for powerpc before 5.14.15. It allows a malicious KVM guest to crash the host, when the host is running on Power8, due to an arch/powerpc/kvm/book3s_hv_rmhandlers.S implementation bug in the handling of the SRR1 register values.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"43056","Ordinal":"2","NoteData":"2021-10-27","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"43056","Ordinal":"3","NoteData":"2021-11-03","Type":"Other","Title":"Modified"}]}}}