CVE-2026-16814
Heap buffer overflow in IBM AIX/PowerVM VIOS enabling remote code execution.
Is CVE-2026-16814 being exploited?
Not confirmed. CVE-2026-16814 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 0.25% probability of exploitation in the next 30 days.
How severe is CVE-2026-16814?
CVE-2026-16814 is rated High with a CVSS score of 8.8. 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-2026-16814?
Yes. A fix has been recorded for CVE-2026-16814. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-16814 affect?
CVE-2026-16814 affects IBM AIX 7.2, IBM AIX 7.3, IBM PowerVM VIOS 4.1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-16814?
Isolate affected hosts, restrict network/management access, enable monitoring, and apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote arbitrary code execution via heap buffer overflow, enabling full compromise of affected AIX/VIOS hosts.
Immediate action required
- affected7.2
- affected7.3
- affected4.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.