CVE-2026-5367

Ovn: ovn: information disclosure via crafted dhcpv6 packets

State: Published
Severity: 8.6 High
Published: Apr 24, 2026
Updated: Aug 25, 2026
Reserved: Apr 1, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.6 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N	redhat
3.1	8.6 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N	redhat-SADP

Weaknesses

CWE-130 Improper Handling of Length Parameter Inconsistency

Affected Products

Product	Versions
Fast Datapath for Red Hat Enterprise Linux 10Red Hat	0:25.03.2-100.el10fdp and laterNot affected
Fast Datapath for Red Hat Enterprise Linux 10Red Hat	0:25.09.2-103.el10fdp and laterNot affected
Fast Datapath for Red Hat Enterprise Linux 8Red Hat	0:21.12.0-145.el8fdp and laterNot affected
Fast Datapath for Red Hat Enterprise Linux 8Red Hat	0:23.06.4-30.el8fdp and laterNot affected
Fast Datapath for Red Hat Enterprise Linux 9Red Hat	0:23.06.4-30.el9fdp and laterNot affected
Fast Datapath for Red Hat Enterprise Linux 9Red Hat	0:23.09.6-16.el9fdp and laterNot affected
Fast Datapath for Red Hat Enterprise Linux 9Red Hat	0:24.03.7-82.el9fdp and laterNot affected
Fast Datapath for Red Hat Enterprise Linux 9Red Hat	0:25.03.2-100.el9fdp and laterNot affected
Fast Datapath for Red Hat Enterprise Linux 9Red Hat	0:25.09.2-103.el9fdp and laterNot affected
Fast Datapath for RHEL 8Red Hat
Fast Datapath for RHEL 8Red Hat
Fast Datapath for RHEL 8Red Hat
Fast Datapath for RHEL 8Red Hat
Fast Datapath for RHEL 9Red Hat
Fast Datapath for RHEL 9Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat

References

RHSA-2026:11694vendor-advisory
RHSA-2026:11695vendor-advisory
RHSA-2026:11696vendor-advisory
RHSA-2026:11698vendor-advisory
RHSA-2026:11700vendor-advisory
RHSA-2026:11701vendor-advisory
RHSA-2026:11702vendor-advisory
RHSA-2026:22110vendor-advisory
RHSA-2026:22111vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-5367vdb-entry
RHBZ#2455863issue-tracking
http://www.openwall.com/lists/oss-security/2026/04/20/3
http://www.openwall.com/lists/oss-security/2026/04/20/5
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5367.json

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