CVE-2026-114408: In Eclipse ThreadX NetX Duo versions 6.4.5.202504 through 6.5.2.202603a, built with IPv6 path MTU discovery, t

Routine

HIGH 8.7UPGRADE

CVE-2026-114408 is a high-severity flaw (CVSS 8.7) affecting eclipse threadx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 fau

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.7 (High)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-252, CWE-476
Published	2026-11-02
Last modified	2026-11-02

Publisher (CNA): eclipse · Vendor: eclipse foundation · Source: CVE Program record (NVD analysis pending)

Last updated 2026-11-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-02 15:04 UTCPublished CVE record published
2026-11-02 15:04 UTCUpdated Record last modified

eclipse foundation eclipse threadx UPGRADE

Affected: >= 6.4.5 and <= 6.5.2.202603a

Fixed in: newer than 6.5.2.202603a

Safe to downgrade to: a release before 6.4.5

1. Check installed version

apt-cache policy eclipse-threadx || rpm -q eclipse-threadx || eclipse-threadx --version

2. UPGRADE to newer than 6.5.2.202603a (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade eclipse-threadx

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade eclipse-threadx

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.4.5 (Debian / Ubuntu)

apt-cache madison eclipse-threadx sudo apt install eclipse-threadx=<VERSION_BEFORE_6.4.5> sudo apt-mark hold eclipse-threadx

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list eclipse-threadx sudo dnf downgrade eclipse-threadx-<VERSION_BEFORE_6.4.5> sudo dnf versionlock add eclipse-threadx

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Advisories and coverage

Research and news

VulDB Recent Entries: CVE-2026-114408 | Eclipse NetX Duo up to 6.5.2.202603a ICMPv6 Packet Too Big null pointer dereference 2026-11-02

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-114408?

eclipse threadx: upgrade to newer than 6.5.2.202603a. Exact commands for each OS are on this page.

Is CVE-2026-114408 being exploited?

CVE-2026-114408 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-114408 affect?

CVE-2026-114408 affects eclipse threadx. Severity is high (CVSS 8.7). 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

How urgent is CVE-2026-114408?

Priority 30/100. High severity

Related CVEs

CVE-2026-115654 MEDIUM 6.9 UPGRADE In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the Module Manager's thread-control services do not ch
CVE-2026-115653 HIGH 7 UPGRADE In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the PendSV handler of the Cortex-M module ports saves

References

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