7.1 High

CVE-2026-102726 Unbounded PPP IPCP Option Parsing Causes a Worker Stall and Out-of-bounds Read

Description

In Eclipse ThreadX NetX Duo versions 6.0 through 6.5.2.202603a, the PPP IPCP code parses a peer's Configure-Nak without validating each option's length. A malicious PPP peer can stall the PPP thread indefinitely with a zero-length option, taking the link down, and can read back up to four bytes of packet-buffer memory per exchange with a short address option.

CVSS 4.0 detail

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

Exploitable from the adjacent network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Adjacent network
Attack complexity: Low
Attack requirements: None
Privileges required: None
Interaction: None
Confidentiality: Low
Integrity: None
Availability: High
Confidentiality of other systems: None
Integrity of other systems: None
Availability of other systems: None

Affected products and versions

Product	Affected versions	Fixed in
NetX Duo 6.5	earliest → 6.5.1.202602	No fix stated
Eclipse ThreadX NetX Duo 6.5	earliest → < 6.5.2.202603b	6.5.2.202603b
Eclipse ThreadX NetX Duo 6.0	6.0 → 6.5.2.202603a	No fix stated

References

github.com github.com

Timeline

Published September 29, 2026
Last modified November 4, 2026

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