Out-of-bounds Read in Ibm I

CVE-2026-18020

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to an off-by-one error in bounds checking.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

  • Ibm I — versions 7.6, 7.5, 7.4

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-18020?
CVE-2026-18020 is a medium-severity vulnerability in Ibm I, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-08-13.
How severe is CVE-2026-18020?
Medium severity. CVSS v3 base score is 5.3 out of 10.