CVE-2026-5367 (GCVE-0-2026-5367)
Vulnerability from cvelistv5
Published
2026-04-24 12:25
Modified
2026-08-25 12:05
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-130 - Improper Handling of Length Parameter Inconsistency
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
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Impacted products
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| Red Hat | Fast Datapath for Red Hat Enterprise Linux 10 |
Unaffected: 0:25.03.2-100.el10fdp < * cpe:/o:redhat:enterprise_linux:10::fastdatapath |
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\"https://access.redhat.com/errata/RHSA-2026:11701\", \"name\": \"RHSA-2026:11701\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:11702\", \"name\": \"RHSA-2026:11702\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:22110\", \"name\": \"RHSA-2026:22110\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:22111\", \"name\": \"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\"]}], \"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\"}, \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-130\", \"description\": \"Improper Handling of Length Parameter Inconsistency\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-08-25T02:19:18.377Z\"}, \"x_redhatCweChain\": \"CWE-130: Improper Handling of Length Parameter Inconsistency\"}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-5367\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-25T12:05:47.898Z\", \"dateReserved\": \"2026-04-01T18:39:05.229Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2026-04-24T12:25:05.024Z\", \"assignerShortName\": \"redhat\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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