{"id":"CVE-2026-16931","state":"PUBLISHED","title":"IBM i is Affected By A 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 handling of zero-length TCP options.","publishedAt":"2026-08-12T17:27:35.728Z","updatedAt":"2026-08-12T18:52:18.936Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"ibm"},"assigner":"ibm","products":["IBM i"],"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":["https://www.ibm.com/support/pages/node/7283288"],"weaknesses":["CWE-835"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/16xxx/CVE-2026-16931.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-16931","state":"PUBLISHED","datePublished":"2026-08-12T17:27:35.728Z","dateUpdated":"2026-08-12T18:52:18.936Z","assignerShortName":"ibm","assignerOrgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateReserved":"2026-07-24T07:27:02.461Z"},"containers":{"cna":{"title":"IBM i is Affected By A 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 handling of zero-length TCP options."}],"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/7283288","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":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-835","lang":"en","description":"CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')","type":"CWE"}]}],"providerMetadata":{"shortName":"ibm","orgId":"9a959283-ebb5-44b6-b705-dcc2bbced522","dateUpdated":"2026-08-12T17:27:35.728Z"},"solutions":[{"lang":"en","value":"IBM strongly recommends addressing the vulnerability now.\n\nIBM i Release5770-999\nPTF Number(s)PTF Download Link(s)7.6MJ10911 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10911 7.5MJ10912 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10912 7.4MJ10913 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10913 7.3MJ10914 https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10914 \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>5770-999<br/>PTF Number(s)</strong></td><td><strong>PTF Download Link(s)</strong></td></tr></thead><tbody><tr><td>7.6</td><td>MJ10911</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10911\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10911</a></td></tr><tr><td>7.5</td><td>MJ10912</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10912\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10912</a></td></tr><tr><td>7.4</td><td>MJ10913</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10913\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10913</a></td></tr><tr><td>7.3</td><td>MJ10914</td><td><a href=\"https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10914\" rel=\"noopener noreferrer nofollow\">https://www.ibm.com/mysupport/s/fix-information?legacy=MJ10914</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":"2026-08-12T18:52:11.894592Z","id":"CVE-2026-16931","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-12T18:52:18.936Z"}}]}}}