CVE-2026-86846

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{"acknowledgement": "Red Hat would like to thank Anthropic Research for reporting this issue.", "bugzilla": {"description": "dpdk: dpdk: Guest can trigger out-of-bounds write by controlling avail ring index in vhost-crypto", "id": "2529846", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2529846"}, "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-787", "details": ["A flaw was found in DPDK lib/vhost vhost-crypto. A guest can supply an avail-ring descriptor index that is used without bounds checking, causing an out-of-bounds write in the host vhost-crypto backend."], "mitigation": {"lang": "en:us", "value": "Do not attach a virtio-crypto vhost-user backend to untrusted guests."}, "name": "CVE-2026-86846", "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": "2026-10-14T15:01:43Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-86846\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-86846"], "statement": "A guest with a virtio-crypto vhost-user device can trigger this flaw. Red Hat has rated this as having a security impact of Moderate. Product impact depends on whether vhost-crypto is built and enabled.", "threat_severity": "Moderate"}

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