Affects core network virtualization in many deployments; high impact; data disclosure risk.
CVE-2026-5367
DHCPv6 SOLICIT triggers out-of-bounds read in OVN, causing heap memory disclosure.
Is CVE-2026-5367 being exploited?
Not confirmed. CVE-2026-5367 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.87% probability of exploitation in the next 30 days.
How severe is CVE-2026-5367?
CVE-2026-5367 is rated High with a CVSS score of 8.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-5367?
Yes. A fix has been recorded for CVE-2026-5367. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-5367 affect?
CVE-2026-5367 affects OVN - Open Virtual Network. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-5367?
Patch when available; monitor DHCPv6 traffic and ovn-controller activity.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker could read heap memory via out-of-bounds read in ovn-controller triggered by DHCPv6 SOLICIT, leaking data.
Patch when possible