Vulnerability-Lookup

ubuntu-cve-2026-5367

Vulnerability from osv_ubuntu

Published

2026-04-20 00:00

Modified

2026-05-20 15:24

Summary

Details

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.

Severity

8.6 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-5367	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-5367	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "20.03.2-0ubuntu0.20.04.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@20.03.2-0ubuntu0.20.04.6?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.12.90~git20200107.c80e014d4-0ubuntu1",
        "2.12.90~git20200107.c80e014d4-0ubuntu2",
        "20.03.0~git20200212.9a4e68ec8-0ubuntu1",
        "20.03.0~git20200212.9a4e68ec8-0ubuntu3",
        "20.03.0-0ubuntu1",
        "20.03.1-0ubuntu1",
        "20.03.1-0ubuntu1.1",
        "20.03.1-0ubuntu1.2",
        "20.03.2-0ubuntu0.20.04.1",
        "20.03.2-0ubuntu0.20.04.2",
        "20.03.2-0ubuntu0.20.04.3",
        "20.03.2-0ubuntu0.20.04.4",
        "20.03.2-0ubuntu0.20.04.5",
        "20.03.2-0ubuntu0.20.04.6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "22.03.8-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "22.03.8-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "22.03.8-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "22.03.8-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "22.03.8-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "22.03.8-0ubuntu0.22.04.1"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "22.03.8-0ubuntu0.22.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@22.03.8-0ubuntu0.22.04.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "21.09.0~git20210922.6549e5842-0ubuntu1",
        "21.09.0~git20210922.6549e5842-0ubuntu2",
        "21.09.0-0ubuntu2",
        "21.12.0-0ubuntu1",
        "22.03.0~git20220218.ed81be7-0ubuntu1",
        "22.03.0-0ubuntu1",
        "22.03.2-0ubuntu0.22.04.1",
        "22.03.3-0ubuntu0.22.04.1",
        "22.03.3-0ubuntu0.22.04.2",
        "22.03.3-0ubuntu0.22.04.3",
        "22.03.3-0ubuntu0.22.04.5",
        "22.03.8-0ubuntu0.22.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "24.03.6-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "24.03.6-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "24.03.6-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "24.03.6-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "24.03.6-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "24.03.6-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "24.03.6-0ubuntu0.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@24.03.6-0ubuntu0.24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "23.09.0-1",
        "23.09.0-2",
        "24.03.0~git20240205.ebb7076-1",
        "24.03.1-2ubuntu1",
        "24.03.1-2ubuntu3",
        "24.03.2-0ubuntu0.24.04.1",
        "24.03.2-0ubuntu0.24.04.2",
        "24.03.6-0ubuntu0.24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "25.09.0-1"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "25.09.0-1"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "25.09.0-1"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "25.09.0-1"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "25.09.0-1"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "25.09.0-1"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "25.09.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@25.09.0-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "25.03.0-1",
        "25.09.0~git20250813.23884f5-maysync1",
        "25.09.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ovn-central",
            "binary_version": "26.03.0-2"
          },
          {
            "binary_name": "ovn-common",
            "binary_version": "26.03.0-2"
          },
          {
            "binary_name": "ovn-controller-vtep",
            "binary_version": "26.03.0-2"
          },
          {
            "binary_name": "ovn-docker",
            "binary_version": "26.03.0-2"
          },
          {
            "binary_name": "ovn-host",
            "binary_version": "26.03.0-2"
          },
          {
            "binary_name": "ovn-ic",
            "binary_version": "26.03.0-2"
          },
          {
            "binary_name": "ovn-ic-db",
            "binary_version": "26.03.0-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "ovn",
        "purl": "pkg:deb/ubuntu/ovn@26.03.0-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "25.09.0-1",
        "25.09.0-3",
        "26.03.0~git20260216.b543a88-2",
        "26.03.0-2"
      ]
    }
  ],
  "aliases": [],
  "details": "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\u0027s virtual machine port.",
  "id": "UBUNTU-CVE-2026-5367",
  "modified": "2026-05-20T15:24:32Z",
  "published": "2026-04-20T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-5367"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-5367"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-5367"
  ]
}

CVE-2026-5367 (GCVE-0-2026-5367)

Vulnerability from cvelistv5 – Published: 2026-04-24 12:25 – Updated: 2026-07-15 00:44

Title

Ovn: ovn: information disclosure via crafted dhcpv6 packets

Summary

Severity

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-130 - Improper Handling of Length Parameter Inconsistency

Assigner

redhat

References

14 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:11694	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:11695	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:11696	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:11698	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:11700	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:11701	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:11702	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22110	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22111	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-5367	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2455863	issue-trackingx_refsource_REDHAT
http://www.openwall.com/lists/oss-security/2026/04/20/3
http://www.openwall.com/lists/oss-security/2026/04/20/5
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex

Impacted products

12 products

Vendor	Product	Version
Red Hat	Fast Datapath for Red Hat Enterprise Linux 10	Unaffected: 0:25.03.2-100.el10fdp , < * (rpm) cpe:/o:redhat:enterprise_linux:10::fastdatapath
Red Hat	Fast Datapath for Red Hat Enterprise Linux 10	Unaffected: 0:25.09.2-103.el10fdp , < * (rpm) cpe:/o:redhat:enterprise_linux:10::fastdatapath
Red Hat	Fast Datapath for Red Hat Enterprise Linux 8	Unaffected: 0:21.12.0-145.el8fdp , < * (rpm) cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat	Fast Datapath for Red Hat Enterprise Linux 8	Unaffected: 0:23.06.4-30.el8fdp , < * (rpm) cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat	Fast Datapath for Red Hat Enterprise Linux 9	Unaffected: 0:23.06.4-30.el9fdp , < * (rpm) cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat	Fast Datapath for Red Hat Enterprise Linux 9	Unaffected: 0:23.09.6-16.el9fdp , < * (rpm) cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat	Fast Datapath for Red Hat Enterprise Linux 9	Unaffected: 0:24.03.7-82.el9fdp , < * (rpm) cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat	Fast Datapath for Red Hat Enterprise Linux 9	Unaffected: 0:25.03.2-100.el9fdp , < * (rpm) cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat	Fast Datapath for Red Hat Enterprise Linux 9	Unaffected: 0:25.09.2-103.el9fdp , < * (rpm) cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat	Fast Datapath for RHEL 8	cpe:/o:redhat:enterprise_linux:8::fastdatapath
Red Hat	Fast Datapath for RHEL 9	cpe:/o:redhat:enterprise_linux:9::fastdatapath
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-04-13 00:00

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2026-04-24T13:37:14.640Z",
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          },
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        ],
        "title": "CVE Program Container"
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              "content": {
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        "affected": [
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            "cpes": [
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            ],
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          },
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            "packageName": "ovn2.11",
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            "vendor": "Red Hat"
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            "cpes": [
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          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:22110"
        },
        {
          "name": "RHSA-2026:22111",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:22111"
        },
        {
          "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"
        }
      ],
      "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 \u003cworkload-port\u003e 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_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-130: Improper Handling of Length Parameter Inconsistency"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-5367",
    "datePublished": "2026-04-24T12:25:05.024Z",
    "dateReserved": "2026-04-01T18:39:05.229Z",
    "dateUpdated": "2026-07-15T00:44:01.502Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

ubuntu-cve-2026-5367

Vulnerability from osv_ubuntu

CVE-2026-5367 (GCVE-0-2026-5367)

Tags

Sightings

Nomenclature