CVE-2026-18511: IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local authenticated attacker to generate a stack-based buffer overflow in the Native IBM i JSSE provider, caused by…

PriorityP343high7.8CVSS 3.1

AVLACLPRLUINSUCHIHAH

EPSS

0.17%

7.2th percentile

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local authenticated attacker to generate a stack-based buffer overflow in the Native IBM i JSSE provider, caused by improper bounds checking during TLS session establishment. A local attacker could overflow a fixed-length buffer and execute arbitrary code on the system or cause the JVM process to crash.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
ibm	i	—	—
ibm	i	—	—
ibm	i	—	—
ibm	i	—	—

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