CVE-2026-16815
Stack-based buffer overflow in IBM i allowing remote DoS and possible info disclosure.
Is CVE-2026-16815 being exploited?
Not confirmed. CVE-2026-16815 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 0.27% probability of exploitation in the next 30 days.
How severe is CVE-2026-16815?
CVE-2026-16815 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-2026-16815?
Yes. A fix has been recorded for CVE-2026-16815. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-16815 affect?
CVE-2026-16815 affects IBM i 7.6, IBM i 7.5, IBM i 7.4, IBM i 7.3. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-16815?
Apply vendor patch when available; otherwise isolate/restrict access to affected services and monitor.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can trigger a stack overflow to crash services (DoS) and may read/leak sensitive memory contents.
Immediate action required
- affected7.6
- affected7.5
- affected7.4
- affected7.3
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.