CVE-2025-55095

Stack exhaustion via cyclic extended-partition recursion

Published Jan 27, 2026 · Updated Jan 27, 2026

Uncontrolled recursion in Eclipse ThreadX USBX 6.4.2 and earlier allows local users to exhaust the host stack with a crafted USB disk. _ux_host_class_storage_partition_read() follows extended-partition sector references by recursively invoking _ux_host_class_storage_media_mount() without limiting depth or tracking visited sectors. Exploitation requires low privileges and user interaction with cyclic or deeply nested partition data, which can interrupt the embedded USB host stack.

CVSS severity4.2
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled recursion in Eclipse ThreadX USBX 6.4.2 and earlier allows local users to exhaust the host stack with a crafted USB disk. _ux_host_class_storage_partition_read() follows extended-partition sector references by recursively invoking _ux_host_class_storage_media_mount() without limiting depth or tracking visited sectors. Exploitation requires low privileges and user interaction with cyclic or deeply nested partition data, which can interrupt the embedded USB host stack.

The record

CVE
CVE-2025-55095
Published
Jan 27, 2026
Updated
Jan 27, 2026
Vendor
The Eclipse Foundation
Product
Eclipse ThreadX USBX
Classifications
CWE-674, CWE-121, T1200
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=6.4.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Eclipse Foundation · Eclipse ThreadX USBXversion=0 <=6.4.2

Published CVSS scores

4.2Eclipse FoundationCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
7.0NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
CWE-121Stack-based Buffer Overflow
T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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