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

published 2026-09-29 40 d ago modified 2026-11-04 5 d ago also EUVD-2026-89193

cvss: 7.1; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Eclipse Foundation Eclipse ThreadX NetX Duo 6.5.2.202603b

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 40 d ago (2026-09-29)

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	7.1	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
CNA	4.0	7.1	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

Eclipse Foundation Eclipse ThreadX NetX Duo

Classification

Weakness

CWE-125 Out-of-bounds Read
CWE-835 Loop with Unreachable Exit Condition

References

github.com /eclipse-threadx/netxduo/security/advisories/GHSA-2wwp-ffgp-6ggj

Sources

CVE List CVE-2026-102726
NVD CVE-2026-102726

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary