{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-17255", "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "state": "PUBLISHED", "assignerShortName": "ibm", "dateReserved": "2026-07-24T22:14:14.142Z", "datePublished": "2026-09-04T16:39:08.401Z", "dateUpdated": "2026-09-04T16:39:08.401Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522", "shortName": "ibm", "dateUpdated": "2026-09-04T16:39:08.401Z"}, "title": "IBM i is Affected By Denial of Service Vulnerability []", "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 remote attacker to cause a denial of service due to improper validation of the prefix length in ICMPv6 Router Advertisements.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to improper validation of the prefix length in ICMPv6 Router Advertisements.</p>"}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7286093", "tags": ["vendor-advisory", "patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW", "baseSeverity": "MEDIUM", "baseScore": 4.3, "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}}], "solutions": [{"lang": "en", "value": "IBM i Release5770-999\u00a0\nPTF Number(s)PTF Download Link(s)7.6MJ11322 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11322 7.5MJ11323 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11323 7.4MJ11324 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11324 7.3MJ11325 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11325 \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": "<div><table><colgroup><col/><col/><col/></colgroup><thead><tr><td><strong>IBM i Release</strong></td><td><strong>5770-999\u00a0<br/>PTF Number(s)</strong></td><td><strong>PTF Download Link(s)</strong></td></tr></thead><tbody><tr><td>7.6</td><td>MJ11322</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11322\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11322</a></td></tr><tr><td>7.5</td><td>MJ11323</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11323\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11323</a></td></tr><tr><td>7.4</td><td>MJ11324</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11324\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11324</a></td></tr><tr><td>7.3</td><td>MJ11325</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11325\" rel=\"nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ11325</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 remote attacker to cause a denial of service due to improper validation of the prefix length in ICMPv6 Router Advertisements."}], "id": "CVE-2026-17255", "lastModified": "2026-09-04T17:16:53.140", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "psirt@us.ibm.com", "type": "Primary"}]}, "published": "2026-09-04T17:16:53.140", "references": [{"source": "psirt@us.ibm.com", "url": "https://www.ibm.com/support/pages/node/7286093"}], "sourceIdentifier": "psirt@us.ibm.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "psirt@us.ibm.com", "type": "Primary"}]}

{}

{}