CVE-2026-18511 (GCVE-0-2026-18511)
Vulnerability from cvelistv5
Published
2026-08-13 20:43
Modified
2026-08-14 13:48
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-787 - Out-of-bounds Write
Summary
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.
References
| URL | Tags | ||||
|---|---|---|---|---|---|
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Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| IBM | i |
Version: 7.6 Version: 7.5 Version: 7.4 Version: 7.3 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:*:*:*:*:*:*:* |
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"title": "IBM i is Affected By Multiple Vulnerabilities in Java Secure Sockets Extension"
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"datePublished": "2026-08-13T20:43:37.477Z",
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rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11088\u003c/a\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e7.5\u003c/td\u003e\u003ctd\u003eSJ11068\u003cbr/\u003eSJ11073\u003cbr/\u003eSJ11070\u003cbr/\u003eSJ11077\u003cbr/\u003eSJ11087\u003cbr/\u003e\u003c/td\u003e\u003ctd\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11068\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11068\u003c/a\u003e\u003cbr/\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11073\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11073\u003c/a\u003e\u003cbr/\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11070\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11070\u003c/a\u003e\u003cbr/\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11077\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11077\u003c/a\u003e\u003cbr/\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11087\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11087\u003c/a\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e7.4\u003c/td\u003e\u003ctd\u003eSJ11071\u003cbr/\u003eSJ11069\u003cbr/\u003eSJ11076\u003cbr/\u003eSJ11086\u003cbr/\u003e\u003c/td\u003e\u003ctd\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11071\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11071\u003c/a\u003e\u003cbr/\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11069\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11069\u003c/a\u003e\u003cbr/\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11076\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11076\u003c/a\u003e\u003cbr/\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11086\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11086\u003c/a\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e7.3\u003c/td\u003e\u003ctd\u003eSJ11067\u003cbr/\u003eSJ11075\u003cbr/\u003eSJ11085\u003cbr/\u003e\u003c/td\u003e\u003ctd\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11067\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11067\u003c/a\u003e\u003cbr/\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11075\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11075\u003c/a\u003e\u003cbr/\u003e\u003ca href=\\\"https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11085\\\" rel=\\\"nofollow\\\"\u003ehttps://www.ibm.com/mysupport/s/fix-information?legacy=SJ11085\u003c/a\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003c/div\u003e\u003cp\u003eIBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.\u003c/p\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://www.ibm.com/support/pages/node/7283285\", \"tags\": [\"vendor-advisory\", \"patch\"]}], \"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\", \"value\": \"\u003cp\u003eIBM 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.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787 Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"shortName\": \"ibm\", \"dateUpdated\": \"2026-08-13T20:43:37.477Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-18511\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-14T13:48:42.524Z\", \"dateReserved\": \"2026-07-31T17:24:47.213Z\", \"assignerOrgId\": \"9a959283-ebb5-44b6-b705-dcc2bbced522\", \"datePublished\": \"2026-08-13T20:43:37.477Z\", \"assignerShortName\": \"ibm\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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