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VulnerabilityPublished

CVE-2026-114408: Eclipse ThreadX · Unchecked Return Value

Affects Eclipse ThreadXSource CVE Database V5

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Not known to be exploited · CVSS 8.7 High.

Data as of 2 Nov 2026, 16:28 UTC

CVSS 4.0 base score
8.7High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (eclipse)CVSS 4.08.7
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Eclipse FoundationEclipse ThreadXAffected
  • >=6.4.5 <=6.5.2.202603a
Fixed in–
GitHubeclipse-threadx/netxduopkg:github/eclipse-threadx/netxduoOther threatsAffected
  • >=6.4.5 <=6.5.2.202603a
  • >=6.4.5.202504 <=6.5.2.202603a
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is released, network administrators should consider mitigating exposure to untrusted networks or filtering ICMPv6 Packet Too Big messages where feasible.

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.

References

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