What’s Vulnerable › Vulnerabilities
CVE-2026-18511: IBM i is Affected By Multiple Vulnerabilities in Java Secure Sockets Extension
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-13 · updated 2026-08-17
- Weakness: CWE-787
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
- IBM i: 7.3, 7.4, 7.5, 7.6
References
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