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"descriptions": [{"lang": "en", "value": "The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host OS panic or hang) by triggering many #DB (aka Debug) exceptions, related to svm.c."}, {"lang": "es", "value": "El subsistema KVM en el kernel Linux hasta la versi\u00f3n 4.2.6, y Xen 4.3.x hasta la versi\u00f3n 4.6.x permite a usuarios del SO invitados causar una denegaci\u00f3n de servicio (panic en el host del SO o cuelgue) desencadenando muchas excepciones #DB (tambi\u00e9n conocidas como Debug), relacionadas con svm.c."}], "id": "CVE-2015-8104", "lastModified": "2025-04-12T10:46:40.837", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 4.7, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": 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Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1278496"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Patch", "Vendor Advisory"], "url": "https://github.com/torvalds/linux/commit/cbdb967af3d54993f5814f1cee0ed311a055377d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://kb.juniper.net/JSA10783"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-399"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2015:2636", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "kernel-0:2.6.32-573.12.1.el6", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2015-12-15T00:00:00Z"}, {"advisory": "RHSA-2016:0046", "cpe": "cpe:/o:redhat:rhel_mission_critical:6.2", "package": "kernel-0:2.6.32-220.65.1.el6", "product_name": "Red Hat Enterprise Linux 6.2 Advanced Update Support", "release_date": "2016-01-19T00:00:00Z"}, {"advisory": "RHSA-2016:0004", "cpe": "cpe:/o:redhat:rhel_aus:6.4", "package": "kernel-0:2.6.32-358.69.1.el6", "product_name": "Red Hat Enterprise Linux 6.4 Advanced Update Support", "release_date": "2016-01-07T00:00:00Z"}, {"advisory": "RHSA-2015:2645", "cpe": "cpe:/o:redhat:rhel_aus:6.5", "package": "kernel-0:2.6.32-431.68.1.el6", "product_name": "Red Hat Enterprise Linux 6.5 Advanced Update Support", "release_date": "2015-12-15T00:00:00Z"}, {"advisory": "RHSA-2016:0024", "cpe": "cpe:/o:redhat:rhel_eus:6.6", "package": "kernel-0:2.6.32-504.40.1.el6", "product_name": "Red Hat Enterprise Linux 6.6 Extended Update Support", "release_date": "2016-01-12T00:00:00Z"}, {"advisory": "RHSA-2015:2552", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-327.3.1.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2015-12-08T00:00:00Z"}, {"advisory": "RHSA-2016:0103", "cpe": "cpe:/o:redhat:rhel_eus:7.1", "package": "kernel-0:3.10.0-229.26.2.ael7b", "product_name": "Red Hat Enterprise Linux 7.1 Extended Update Support", "release_date": "2016-02-02T00:00:00Z"}], "bugzilla": {"description": "virt: guest to host DoS by triggering an infinite loop in microcode via #DB exception", "id": "1278496", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1278496"}, "csaw": false, "cvss": {"cvss_base_score": "5.2", "cvss_scoring_vector": "AV:A/AC:M/Au:S/C:N/I:N/A:C", "status": "verified"}, "cwe": "CWE-835", "details": ["The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host OS panic or hang) by triggering many #DB (aka Debug) exceptions, related to svm.c.", "It was found that the x86 ISA (Instruction Set Architecture) is prone to a denial of service attack inside a virtualized environment in the form of an infinite loop in the microcode due to the way (sequential) delivering of benign exceptions such as #DB (debug exception) is handled. A privileged user inside a guest could use this flaw to create denial of service conditions on the host kernel."], "name": "CVE-2015-8104", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "kvm", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "xen", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2015-11-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-8104\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-8104"], "statement": "This issue affects the version of the kvm & xen packages as shipped with Red Hat Enterprise Linux 5.\nThis issue does not affect the versions of the kernel package as shipped with\nRed Hat Enterprise Linux 5 and Red Hat Enterprise MRG 2.\nThis issue affects the version of Linux kernel as shipped with\nRed Hat Enterprise Linux 6 and 7. Future kernel updates for the respective releases may address this issue.\nRed Hat Enterprise Linux 5 is now in Production Phase 3 of the support and\nmaintenance life cycle. Thus it is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.", "threat_severity": "Important"}