{ "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": "2026-08-25T12:05:47.898Z" }, "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. 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"packageName": "ovn2.11", "defaultStatus": "unaffected", "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": "unaffected", "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": "unaffected", "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 9", "collectionURL": 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"RHSA-2026:22111", "tags": [ "vendor-advisory", "x_refsource_REDHAT" ] }, { "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 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 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"Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:openshift:4" ], "defaultStatus": "affected", "packageName": "ovn24.03", "product": "Red Hat OpenShift Container Platform 4", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:openshift:4" ], "defaultStatus": "affected", "packageName": "ovn24.09", "product": "Red Hat OpenShift Container Platform 4", "vendor": "Red Hat" }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:openshift:4" ], "defaultStatus": "affected", "packageName": "ovn25.03", "product": "Red Hat OpenShift Container Platform 4", "vendor": "Red Hat" } ], "datePublic": "2026-04-13T00:00:00.000Z", "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." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "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" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-130", "description": "Improper Handling of Length Parameter Inconsistency", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-5367" }, { "name": "RHBZ#2455863", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455863" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5367.json" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:22110" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:22111" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:11694" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:11695" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:11696" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:11698" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:11700" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:11701" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:11702" } ], "solutions": [ { "lang": "en", "value": "RHSA-2026:22110: Fast Datapath for Red Hat Enterprise Linux 10" }, { "lang": "en", "value": "RHSA-2026:22111: Fast Datapath for Red Hat Enterprise Linux 10" }, { "lang": "en", "value": "RHSA-2026:11694: Fast Datapath for Red Hat Enterprise Linux 8" }, { "lang": "en", "value": "RHSA-2026:11695: Fast Datapath for Red Hat Enterprise Linux 8" }, { "lang": "en", "value": "RHSA-2026:11696: Fast Datapath for Red Hat Enterprise Linux 9" }, { "lang": "en", "value": "RHSA-2026:11698: Fast Datapath for Red Hat Enterprise Linux 9" }, { "lang": "en", "value": "RHSA-2026:11700: Fast Datapath for Red Hat Enterprise Linux 9" }, { "lang": "en", "value": "RHSA-2026:11701: Fast Datapath for Red Hat Enterprise Linux 9" }, { "lang": "en", "value": "RHSA-2026:11702: Fast Datapath for Red Hat Enterprise Linux 9" } ], "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." } ], "title": "ovn: OVN: Information disclosure via crafted DHCPv6 packets", "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 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." } ], "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-08-25T12:05:47.898Z" } } ] } }