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7.3 High

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…

Description

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 products and versions

Product Affected versions Fixed in
i 7.6 No fix stated
i 7.5 No fix stated
i 7.4 No fix stated
i 7.3 No fix stated

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