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CVE-2026-114408— NULL pointer dereference in ICMPv6 Packet Too Big processing when the destination table is full

Quick assessment

Affected
Eclipse Foundation Eclipse ThreadX
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Eclipse ThreadX NetX Duo 的 6.4.5.202504 至 6.5.2.202603a 版本中，若启用了 IPv6 路径 MTU 发现功能，ICMPv6“数据包过大”（Packet Too Big）处理程序会直接使用其尝试添加的目的表项，而未验证该添加操作是否成功。网络中的攻击者可通过发送大量引用新目的地址的“数据包过大”消息，将目的表填满；随后，下一条消息将导致 IP 辅助线程解引用空指针。在地址 0 触发异常的平台上，这将造成该线程崩溃，并中断所有网络处理流程。

CVSS 8.7 · High

Possible ATT&CK Techniques 1 AI

T1499.005

Affected Version Matrix 1

VendorProduct Version RangeStatus
Eclipse Foundation Eclipse ThreadX 6.4.5≤ 6.5.2.202603a affected
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I. Basic Information for CVE-2026-114408

Vulnerability Information
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Vulnerability Title
NULL pointer dereference in ICMPv6 Packet Too Big processing when the destination table is full
Source: CVE Program / CVE List V5
Vulnerability Description
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 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
未加检查的返回值
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eclipse Foundation Eclipse ThreadX 6.4.5 ~ 6.5.2.202603a -

II. Public POCs for CVE-2026-114408

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III. Intelligence Information for CVE-2026-114408

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Other References for CVE-2026-114408 (2)

Same Patch Batch · Eclipse Foundation · 2026-11-02 · 4 CVEs total

CVE-2026-115653 7.0 HIGH Cortex-M module ports save a preempted user-mode module thread's registers through its unc
CVE-2026-115654 6.9 MEDIUM User-mode module can suspend, terminate, re-prioritise and abort the waits of threads it d
CVE-2026-118052 6.8 MEDIUM Module Manager loaders leave the manager mutex held when a module preamble's sizes overflo

IV. Related Vulnerabilities

Same product: Eclipse ThreadX
Same vendor: Eclipse Foundation
Same weakness: CWE-252