{"id":"CVE-2026-17255","title":"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.","summary":"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.","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-787"],"vendor":"ibm","product":"i","affected":["i = 7.3","i = 7.4","i = 7.5","i = 7.6"],"published":"2026-09-04","updated":"2026-09-10","sourceUpdated":"2026-09-10T16:17:08.337","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-17255","references":[{"url":"https://www.ibm.com/support/pages/node/7286093","label":"psirt@us.ibm.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-09T18:27:28.122624Z"},"epss":0.00405,"epssPercentile":0.34524,"ingestedAt":"2026-09-08T15:33:26.962Z","slug":"CVE-2026-17255","body":"## Overview\n\nIBM 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.\n\n## Affected\n\n- `i = 7.3`\n- `i = 7.4`\n- `i = 7.5`\n- `i = 7.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}