Description
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.
References10
- access.redhat.com/errata/RHSA-2026:11694
- access.redhat.com/errata/RHSA-2026:11695
- access.redhat.com/errata/RHSA-2026:11696
- access.redhat.com/errata/RHSA-2026:11698
- access.redhat.com/errata/RHSA-2026:11700
- access.redhat.com/errata/RHSA-2026:11701
- access.redhat.com/errata/RHSA-2026:11702
- access.redhat.com/errata/RHSA-2026:22110
- access.redhat.com/errata/RHSA-2026:22111
- access.redhat.com/security/cve/CVE-2026-5367
Metrics
- CVSS 3.1
-
8.6
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - EPSS — exploit probability
- 1% percentile: 59 · as of 13 November 2026
- CWE
- CWE-130
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.