CVE-2026-18511
IBM i is Affected By Multiple Vulnerabilities in Java Secure Sockets Extension
- State
- Published
- Severity
- 7.3 High
- Published
- Aug 13, 2026
- Updated
- Aug 14, 2026
- Reserved
- Jul 31, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | ibm |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
iIBM |
|
References
- https://www.ibm.com/support/pages/node/7283285vendor-advisorypatch
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