{"id":"CVE-2026-17255","state":"PUBLISHED","title":"IBM i is Affected By Denial of Service Vulnerability []","description":"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.","publishedAt":"2026-09-04T16:39:08.401Z","updatedAt":"2026-09-10T15:06:37.340Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","source":"ibm"},"assigner":"ibm","products":["IBM 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i is Affected By Denial of Service Vulnerability []","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."}],"affected":[{"vendor":"IBM","product":"i","versions":[{"version":"7.6","status":"affected"},{"version":"7.5","status":"affected"},{"version":"7.4","status":"affected"},{"version":"7.3","status":"affected"}],"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:*:*:*:*:*:*:*"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787 Out-of-bounds Write","type":"CWE"}]}],"providerMetadata":{"shortName":"ibm","orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateUpdated":"2026-09-04T16:39:08.401Z"},"solutions":[{"lang":"en","value":"IBM i Release5770-999 \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 <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>"}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-09T18:27:28.122624Z","id":"CVE-2026-17255","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-10T15:06:37.340Z"}}]}}}