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Review reviewHigh

CVE-2026-5367

Red Hat Fast Datapath for Red Hat Enterprise Linux 10, Fast Datapath for Red Hat Enterprise Linux 8, Fast Datapath for Red Hat Enterprise Linux 9

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.

CVSS
8.6
EPSS
0.87%
55.1% percentile
CISA KEV
Not listed
Published
2026.04.24
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.87%
Technical severityCVSS 8.6

Vulnerability overview

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 product and versions

Product
Red Hat Fast Datapath for Red Hat Enterprise Linux 10, Fast Datapath for Red Hat Enterprise Linux 8, Fast Datapath for Red Hat Enterprise Linux 9
Affected versions
See the vendor advisory and NVD configuration data
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Red Hat Fast Datapath for Red Hat Enterprise Linux 10, Fast Datapath for Red Hat Enterprise Linux 8, Fast Datapath for Red Hat Enterprise Linux 9 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

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