What is the CVSS score of CVE-2025-55095?

CVE-2025-55095 has a CVSS 3.1 base score of 4.2 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L. EPSS exploitation probability: 0.0%.

Which versions of Threadx Usbx are affected by CVE-2025-55095?

CVE-2025-55095 presents moderate security risk, a stack-based buffer overflow vulnerability rated CVSS 4.2. Exploitation could cause memory corruption or application crashes.

How to fix or mitigate CVE-2025-55095?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Threadx Usbx CVE-2025-55095

MEDIUM

Stack-based Buffer Overflow (CWE-121)

2026-01-27 emo@eclipse.org

Stack Overflow Buffer Overflow Threadx Usbx

4.2

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.2 MEDIUM

AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Jan 27, 2026 - 16:16 nvd

MEDIUM 4.2

DescriptionCVE.org

The function _ux_host_class_storage_media_mount() is responsible for mounting partitions on a USB mass storage device. When it encounters an extended partition entry in the partition table, it recursively calls itself to mount the next logical partition.

This recursion occurs in _ux_host_class_storage_partition_read(), which parses up to four partition entries. If an extended partition is found (with type UX_HOST_CLASS_STORAGE_PARTITION_EXTENDED or EXTENDED_LBA_MAPPED), the code invokes: _ux_host_class_storage_media_mount(storage, sector + _ux_utility_long_get(...));

There is no limit on the recursion depth or tracking of visited sectors. As a result, a malicious or malformed disk image can include cyclic or excessively deep chains of extended partitions, causing the function to recurse until stack overflow occurs.

AnalysisAI

Technical ContextAI

Classified as CWE-121 (Stack-based Buffer Overflow). The function _ux_host_class_storage_media_mount() is responsible for mounting partitions on a USB mass storage device. When it encounters an extended partition entry in the partition table, it recursively calls itself to mount the next logical partition.