{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-5367", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-04-01T18:39:05.229Z", "datePublished": "2026-04-24T12:25:05.024Z", "dateUpdated": "2026-04-24T13:37:14.640Z"}, "containers": {"cna": {"title": "Ovn: ovn: information disclosure via crafted dhcpv6 packets", "metrics": [{"other": {"content": {"value": "Important", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "A flaw was found in OVN (Open Virtual Network). A remote attacker, by sending crafted DHCPv6 (Dynamic Host Configuration Protocol for IPv6) SOLICIT packets with an inflated Client ID length, could cause the ovn-controller to read beyond the bounds of a packet. This out-of-bounds read can lead to the disclosure of sensitive information stored in heap memory, which is then returned to the attacker's virtual machine port."}], "affected": [{"vendor": "Red Hat", "product": "Fast Datapath for RHEL 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn2.11", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:7::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn2.12", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:7::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn2.13", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:7::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn-2021", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn2.11", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn2.12", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn2.13", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.03", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.06", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.09", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.12", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn23.03", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn23.06", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:8::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn-2021", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.03", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.06", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.09", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.12", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn23.03", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn23.06", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn23.09", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn24.03", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn24.09", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn25.03", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Fast Datapath for RHEL 9", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn25.09", "defaultStatus": "affected", "cpes": ["cpe:/o:redhat:enterprise_linux:9::fastdatapath"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.06", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.09", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn22.12", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn23.03", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn23.06", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn23.09", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn24.03", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift Container Platform 4", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "ovn24.09", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openshift:4"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-5367", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455863", "name": "RHBZ#2455863", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-04-13T00:00:00.000Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-130", "description": "Improper Handling of Length Parameter Inconsistency", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-130: Improper Handling of Length Parameter Inconsistency", "workarounds": [{"lang": "en", "value": "The only potential mitigation is to disable the DHCPv6 feature for\nworkloads attached to OVN logical ports, e.g.:\n\novn-nbctl clear logical_switch_port <workload-port> dhcpv6_options.\n\nWe do not recommend mitigating the vulnerability this way because it\nwill also disable legitimate DHCPv6 traffic originating from\nworkloads connected to logical switch ports."}], "timeline": [{"lang": "en", "time": "2026-04-07T08:10:53.507Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-04-13T00:00:00.000Z", "value": "Made public."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", 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{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in OVN (Open Virtual Network). A remote attacker, by sending crafted DHCPv6 (Dynamic Host Configuration Protocol for IPv6) SOLICIT packets with an inflated Client ID length, could cause the ovn-controller to read beyond the bounds of a packet. This out-of-bounds read can lead to the disclosure of sensitive information stored in heap memory, which is then returned to the attacker's virtual machine port."}], "id": "CVE-2026-5367", "lastModified": "2026-04-24T14:39:28.770", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "secalert@redhat.com", "type": "Secondary"}]}, "published": "2026-04-24T13:16:21.990", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-5367"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455863"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/04/20/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/04/20/5"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-130"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

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