CVE-2026-16868
Remote DoS in IBM i ASN.1 length parsing via uninitialized memory.
Is CVE-2026-16868 being exploited?
Not confirmed. CVE-2026-16868 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 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-16868?
CVE-2026-16868 is rated High with a CVSS score of 8.1. 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-2026-16868?
Yes. A fix has been recorded for CVE-2026-16868. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-16868 affect?
CVE-2026-16868 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-2026-16868?
Apply IBM fixes when available; block untrusted ASN.1 inputs; monitor and log affected systems.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can trigger denial of service/crash by sending crafted ASN.1 input that causes use of uninitialized memory, disrupting IBM i services.
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.