CVE-2026-5367 HIGH

CVE-2026-5367: Ovn: ovn: information disclosure via crafted dhcpv6 packets

Vendor Red Hat
Product Fast Datapath for RHEL 8
Weakness CWE-130
Published April 24, 2026
Last update June 30, 2026

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 24, 2026 CVE published
June 30, 2026 Record updated