# CVE-2026-102730: Out-of-bounds Write via NAND Metadata Parsing at Mount in LevelX

Status: published. Published: 2026-09-29. Updated: 2026-11-04.

Mounting an attacker-controlled NAND flash image (`lx_nand_flash_open()`) triggers an unbounded out-of-bounds heap **write** in LevelX's NAND flash-translation-layer metadata parser that overwrites a driver function pointer in the control block, giving a demonstrated control-flow hijack — RIP set to a full 8-byte attacker-chosen value (register-verified). Two accompanying OOB reads. All reproduced verbatim under ASan at HEAD `9f1cfdc`.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Eclipse Foundation / Eclipse ThreadX NetX Duo: HEAD `9f1cfdc` and prior; Finding 1 introduced by commit `47b2a17d`; Finding 2 is   the un-patched half of the Nov-2025 fix `0f7dd521`. (affected, custom). Source: CNA: eclipse

## Severity and prioritization

- CVSS 4.0: 8.6 (high); CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: eclipse

- CISA KEV: No listing in collected sources

- EPSS: 0.12% as of 2026-11-03; percentile 1.65%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-787, CWE-1284

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/eclipse-threadx/levelx/security/advisories/GHSA-q6ph-7238-777g (CNA: eclipse)

## Provenance

- CNA: eclipse: https://www.cve.org/CVERecord?id=CVE-2026-102730; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-102730; retrieved 2026-11-04; source updated Not reported

Revision: 1306e1568677a23a2f585e054a4c4521f23a14682d97354c78584ad8486721bd

Canonical: https://y2.dev/cve/CVE-2026-102730

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