CVE-2026-5367
Ovn: ovn: information disclosure via crafted dhcpv6 packets
No known exploitation. EPSS puts it in the 57th percentile. Only a workaround so far.
What to do
No fixed build is published yet. The vendor describes a workaround.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.9% chance of exploitation activity in the next 30 days, which ranks it in the 57th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
11 events over 123 days, from the signal feeds we watch.
- Workaround availableworkaround available, record updated, record updated
- Workaround availablerecord updated
- Workaround availablerecord updated
- OpenVAS check added
- Publishedweakness classified
Affected products
- Fast Datapath for Red Hat Enterprise Linux 10Operating Systems / linux-distro
- Fast Datapath for Red Hat Enterprise Linux 8Operating Systems / linux-distro
- Fast Datapath for Red Hat Enterprise Linux 9Operating Systems / linux-distro
- Fast Datapath for RHEL 8Operating Systems / linux-distro
- Fast Datapath for RHEL 9Operating Systems / linux-distro
- Red Hat OpenShift Container Platform 4Cloud & SaaS / container-orchestration
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Scored 8.6 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity NoneNo integrity impact
- Availability NoneNo availability impact
Weaknesses
Sources
References in the record
- access.redhat.com/errata/RHSA-2026:11694
- access.redhat.com/errata/RHSA-2026:11695
- access.redhat.com/errata/RHSA-2026:11696
And 11 more references. See all after sign-in
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