FKIE_CVE-2026-5367

Vulnerability from fkie_nvd - Published: 2026-04-24 13:16 - Updated: 2026-06-17 10:58
Severity
8.6 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Summary
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.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:11694
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:11695
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:11696
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:11698
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:11700
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:11701
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:11702
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:22110
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:22111
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-5367
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2455863
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/04/20/3
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/04/20/5
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
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          "vendor": "Red Hat"
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          "vendor": "Red Hat"
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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\u0027s virtual machine port."
    }
  ],
  "id": "CVE-2026-5367",
  "lastModified": "2026-06-17T10:58:54.633",
  "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"
      }
    ],
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-5367",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-24T16:58:51.939172Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-24T13:16:21.990",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:11694"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:11695"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:11696"
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      "url": "https://access.redhat.com/errata/RHSA-2026:11698"
    },
    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:11700"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:11701"
    },
    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:11702"
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    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:22110"
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    {
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      "url": "https://access.redhat.com/errata/RHSA-2026:22111"
    },
    {
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      "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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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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