{"id":"CVE-2026-114408","title":"NULL pointer dereference in ICMPv6 Packet Too Big processing when the destination table is full","summary":"In Eclipse ThreadX NetX Duo versions 6.4.5.202504 through 6.5.2.202603a, built with IPv6 path MTU discovery, the ICMPv6 Packet Too Big handler uses the destination-table entry it adds without checking that the add succeeded. A sender on …","severity":"high","cvss":8.7,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-252","CWE-476"],"vendor":"Eclipse Foundation","product":"Eclipse ThreadX NetX Duo","affected":["eclipse_threadx_netx_duo >= 6.4.5.202504 <= 6.5.2.202603a"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-11-02T16:18:37.472445Z"},"published":"2026-11-02","updated":"2026-11-04","sourceUpdated":"2026-11-04T13:32:15.724Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114408","references":[{"url":"https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-xjgr-2wmf-f78j"},{"url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/482"}],"tags":["cve.org"],"epss":0.00364,"epssPercentile":0.30375,"ingestedAt":"2026-11-05T20:33:06.733Z","slug":"CVE-2026-114408","body":"## Overview\n\nIn Eclipse ThreadX NetX Duo versions 6.4.5.202504 through 6.5.2.202603a, built with IPv6 path MTU discovery, the ICMPv6 Packet Too Big handler uses the destination-table entry it adds without checking that the add succeeded. A sender on the network can fill the destination table with Packet Too Big messages quoting new destinations, after which the next message makes the IP helper thread dereference a NULL pointer, crashing it on targets that fault on address 0 and stopping all network processing.\n\n## Affected\n\n- `eclipse_threadx_netx_duo >= 6.4.5.202504 <= 6.5.2.202603a`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}