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CVE-2026-115403— NULL pointer dereference in the BSD raw IPv6 send path 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 6.0 至 6.5.2.202603a 版本中，若系统使用 BSD 原始套接字并启用 IPv6 支持，IPv6 原始发送路径在添加目的表条目后，未验证该添加操作是否成功即直接使用。当目的表已满，且通过默认路由器访问链路外的目的地、而该目的地的邻居缓存条目未知时，若使用包含报头的 IPv6 原始套接字进行发送，将解引用一个空指针。远程发送方可通过填充目的表（例如发送大量 ICMPv6“数据包过大”消息）触发此漏洞，导致发送线程崩溃。

CVSS 8.2 · High
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I. Basic Information for CVE-2026-115403

Vulnerability Information
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Vulnerability Title
NULL pointer dereference in the BSD raw IPv6 send path when the destination table is full
Source: CVE Program / CVE List V5
Vulnerability Description
In Eclipse ThreadX NetX Duo versions 6.0 through 6.5.2.202603a, built with BSD raw socket and IPv6 support, the IPv6 raw send path uses the destination-table entry it adds without checking that the add succeeded. When the destination table is full and an off-link destination is reached through a default router whose neighbour cache entry is unknown, sending on an IPv6 raw socket with header inclusion dereferences a NULL pointer; a remote sender can fill the table, for example with ICMPv6 Packet Too Big messages, and crash the sending thread.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/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 6.0 ~ 6.5.2.202603a -

II. Public POCs for CVE-2026-115403

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III. Intelligence Information for CVE-2026-115403

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Other References for CVE-2026-115403 (2)

Same Patch Batch · Eclipse Foundation · 2026-11-02 · 6 CVEs total

CVE-2026-114408 8.7 HIGH NULL pointer dereference in ICMPv6 Packet Too Big processing when the destination table is
CVE-2026-115215 8.7 HIGH NetX Secure DTLS server allocates a session for each new source before the cookie exchange
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