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CVE-2026-5367

32
FAUCET Score

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.

First published: Apr 24, 2026Last modified: Jun 1, 2026

Impacted Technologies

VendorProductVersion(s)CPE
Red HatRed Hat OpenShift Container Platform 4
All Versions ImpactedCNA affecteddefault affected
Red HatFast Datapath For Red Hat Enterprise Linux 10
Range not provided by sourceCNA affecteddefault affected
Red HatFast Datapath For Red Hat Enterprise Linux 8
Range not provided by sourceCNA affecteddefault affected
Red HatFast Datapath For RHEL 8
All Versions ImpactedCNA affecteddefault affected
Red HatFast Datapath For RHEL 9
All Versions ImpactedCNA affecteddefault affected

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.87%
Probability of exploitation in next 30 days
EPSS Percentile
55.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0087 is in the 30th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-5367.json
openwall.com / lists/oss-security/2026/04/20/3
openwall.com / lists/oss-security/2026/04/20/5
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
bugzilla.redhat.com / show_bug.cgi