Buffer overflow in Ibm I

CVE-2026-17218

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to execute arbitrary code due to an out-of-bounds write.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ibm I — versions 7.6, 7.5, 7.4

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-17218?: CVE-2026-17218 is a critical-severity vulnerability in Ibm I, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2026-08-12.
How severe is CVE-2026-17218?: Critical severity. CVSS v3 base score is 9.8 out of 10.