IBM i is Affected By Multiple Vulnerabilities in Java Secure Sockets Extension
Summary
| CVE | CVE-2026-18511 |
|---|---|
| State | PUBLISHED |
| Assigner | ibm |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-13 21:17:45 UTC |
| Updated | 2026-08-17 13:25:20 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.002170000 probability, percentile 0.124090000 (date 2026-08-17)
Problem Types: CWE-787 | CWE-787 CWE-787 Out-of-bounds Write
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | [email protected] | Secondary | 7.3 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| 3.1 | CNA | CVSS | 7.3 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
CVSS v3.1 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.ibm.com/support/pages/node/7283285 | [email protected] | www.ibm.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
Solutions
CNA: IBM strongly recommends addressing the vulnerability now. IBM i Release5770-JV1 PTF Number(s)PTF Download Link(s)7.6SJ11036 SJ11072 SJ11082 SJ11088 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11036 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11072 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11082 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11088 7.5SJ11068 SJ11073 SJ11070 SJ11077 SJ11087 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11068 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11073 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11070 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11077 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11087 7.4SJ11071 SJ11069 SJ11076 SJ11086 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11071 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11069 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11076 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11086 7.3SJ11067 SJ11075 SJ11085 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11067 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11075 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11085 IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.