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Vulnerability · Published Apr 24, 2026 · Assigned by redhat

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

High 8.6

In plain English

A high-severity security flaw in Fast Datapath for Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).

Severity (CVSS 3.1)8.6High
Exploit odds (30 days)0.9%top 41.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12ovnno fix listedDEBIAN-CVE-2026-5367
Debian:13ovnno fix listedDEBIAN-CVE-2026-5367
Ubuntu:22.04:LTSovnno fix listedUBUNTU-CVE-2026-5367
Ubuntu:24.04:LTSovnno fix listedUBUNTU-CVE-2026-5367
Ubuntu:25.10ovnno fix listedUBUNTU-CVE-2026-5367
Ubuntu:26.04:LTSovnno fix listedUBUNTU-CVE-2026-5367
Ubuntu:26.10ovnno fix listedUBUNTU-CVE-2026-5367

Affected products (as reported)

VendorProductVersions
Red Hat Fast Datapath for Red Hat Enterprise Linux 10 see references
Red Hat Fast Datapath for Red Hat Enterprise Linux 10 see references
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 see references
Red Hat Fast Datapath for Red Hat Enterprise Linux 8 see references
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 see references
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 see references
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 see references
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 see references
Red Hat Fast Datapath for Red Hat Enterprise Linux 9 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 8 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Fast Datapath for RHEL 9 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references
Red Hat Red Hat OpenShift Container Platform 4 see references

Weakness: CWE-130 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

References