CVE-2026-5367
HighCVSS 8.6Exploitation Probability (EPSS)
Elevated risk59th percentile - higher than 59% of all known CVEs
Summary
A flaw was found in OVN (Open Virtual Network) where a remote attacker can send crafted DHCPv6 SOLICIT packets with an inflated Client ID length, causing ovn-controller to read beyond packet bounds. This out-of-bounds read can disclose sensitive heap memory information.
Risk Assessment
The risk involves potential disclosure of sensitive information stored in heap memory, which could be returned to the attacker's virtual machine port, leading to data leakage.
Recommendation
It is recommended to immediately update OVN to a patched version and restrict network access from untrusted sources sending DHCPv6 packets.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

