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lib/vhost. Memory size is not adequately validated before mmap during vhost memory-region setup, which can lead to a host crash or memory corruption."}], "id": "CVE-2026-86561", "lastModified": "2026-10-20T02:17:12.877", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 4.0, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-86561", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-20T01:36:48.250726Z", "version": "2.0.3"}}]}, "published": "2026-10-14T16:17:54.613", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-86561"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2529666"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Anthropic Research for reporting this issue.", "bugzilla": {"description": "dpdk: dpdk: Missing memory size validation before mmap in vhost memory region setup", "id": "2529666", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2529666"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["A flaw was found in DPDK lib/vhost. Memory size is not adequately validated before mmap during vhost memory-region setup, which can lead to a host crash or memory corruption."], "mitigation": {"lang": "en:us", "value": "No mitigation is currently available."}, "name": "CVE-2026-86561", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10::fastdatapath", "fix_state": "Fix deferred", "package_name": "grout", "product_name": "Fast Datapath for RHEL 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch3.5", "product_name": "Fast Datapath for RHEL 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch3.6", "product_name": "Fast Datapath for RHEL 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch2.11", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch2.12", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch2.13", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch2.15", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch2.16", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch2.17", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch3.1", "product_name": "Fast Datapath for RHEL 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Fix deferred", "package_name": "grout", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch2.17", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch3.0", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch3.1", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch3.2", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch3.3", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch3.4", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch3.5", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9::fastdatapath", "fix_state": "Fix deferred", "package_name": "openvswitch3.6", "product_name": "Fast Datapath for RHEL 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "dpdk", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "dpdk", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "dpdk", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openvswitch2.17", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openvswitch3.0", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openvswitch3.1", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Fix deferred", "package_name": "openvswitch", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}], "public_date": "2026-10-14T15:00:10Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-86561\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-86561"], "statement": "A malicious guest that can control vhost-user memory table messages can trigger this flaw. Red Hat has rated this as having a security impact of Important.", "threat_severity": "Moderate"}

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