{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-18511", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "state": "PUBLISHED", "assignerShortName": "ibm", "dateReserved": "2026-07-31T17:24:47.213Z", "datePublished": "2026-08-13T20:43:37.477Z", "dateUpdated": "2026-08-13T20:43:37.477Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-08-13T20:43:37.477Z"}, "title": "IBM i is Affected By Multiple Vulnerabilities in Java Secure Sockets Extension", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write", "type": "CWE"}]}], "affected": [{"vendor": "IBM", "product": "i", "versions": [{"status": "affected", "version": "7.6"}, {"status": "affected", "version": "7.5"}, {"status": "affected", "version": "7.4"}, {"status": "affected", "version": "7.3"}], "cpes": ["cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.3:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.3.0:*:*:*:*:*:*:*"]}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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.</p>"}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7283285", "tags": ["vendor-advisory", "patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW", "baseSeverity": "HIGH", "baseScore": 7.3, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}}], "solutions": [{"lang": "en", "value": "IBM strongly recommends addressing the vulnerability now.\n\nIBM i Release5770-JV1\nPTF Number(s)PTF Download Link(s)7.6SJ11036\nSJ11072\nSJ11082\nSJ11088 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11036 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11072 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11082 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11088 7.5SJ11068\nSJ11073\nSJ11070\nSJ11077\nSJ11087\n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11068 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11073 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11070 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11077 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11087 7.4SJ11071\nSJ11069\nSJ11076\nSJ11086\n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11071 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11069 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11076 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11086 7.3SJ11067\nSJ11075\nSJ11085\n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11067 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11075 \n https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11085 \n\n\n\nIBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p><strong>IBM strongly recommends addressing the vulnerability now.</strong></p><div><table><colgroup><col/><col/><col/></colgroup><thead><tr><td><strong>IBM i Release</strong></td><td><strong>5770-JV1<br/>PTF Number(s)</strong></td><td><strong>PTF Download Link(s)</strong></td></tr></thead><tbody><tr><td>7.6</td><td>SJ11036<br/>SJ11072<br/>SJ11082<br/>SJ11088</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11036\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11036</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11072\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11072</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11082\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11082</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11088\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11088</a></td></tr><tr><td>7.5</td><td>SJ11068<br/>SJ11073<br/>SJ11070<br/>SJ11077<br/>SJ11087<br/></td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11068\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11068</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11073\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11073</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11070\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11070</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11077\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11077</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11087\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11087</a></td></tr><tr><td>7.4</td><td>SJ11071<br/>SJ11069<br/>SJ11076<br/>SJ11086<br/></td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11071\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11071</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11069\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11069</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11076\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11076</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11086\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11086</a></td></tr><tr><td>7.3</td><td>SJ11067<br/>SJ11075<br/>SJ11085<br/></td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11067\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11067</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11075\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11075</a><br/><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11085\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11085</a></td></tr></tbody></table></div><p>IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.</p>"}]}]}}}

{}

{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.3:*:*:*:*:*:*:*", "cpe:2.3:a:ibm:i:7.3.0:*:*:*:*:*:*:*"], "product": "i", "vendor": "IBM", "versions": [{"status": "affected", "version": "7.6"}, {"status": "affected", "version": "7.5"}, {"status": "affected", "version": "7.4"}, {"status": "affected", "version": "7.3"}]}], "source": "psirt@us.ibm.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-18511", "lastModified": "2026-08-13T21:17:45.220", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "psirt@us.ibm.com", "type": "Primary"}]}, "published": "2026-08-13T21:17:45.220", "references": [{"source": "psirt@us.ibm.com", "url": "https://www.ibm.com/support/pages/node/7283285"}], "sourceIdentifier": "psirt@us.ibm.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "psirt@us.ibm.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.6"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "7.3"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "i", "source": "cna", "vendor": "IBM"}, "product": "i", "vendor": "ibm"}], "created": "2026-08-13T22:45:03.440628+00:00", "updated": "2026-08-13T22:45:03.555205+00:00", "vendors": ["ibm", "ibm$PRODUCT$i"]}