CVE-2025-68656

Code execution via stale HID transfer pointer

Published Jan 12, 2026 · Updated Jan 12, 2026

Use-after-free in Espressif Systems ESP-USB before 1.1.0 allows physically proximate attackers to corrupt memory via a crafted HID device. usb_class_request_get_descriptor() frees and replaces hid_device->ctrl_xfer for an oversized Report Descriptor, then writes the setup packet through its stale local pointer. Physical attachment of a malicious USB HID device is required; the resulting heap overwrite occurs in the USB host task and enables arbitrary code execution.

CVSS severity6.8
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Espressif Systems ESP-USB before 1.1.0 allows physically proximate attackers to corrupt memory via a crafted HID device. usb_class_request_get_descriptor() frees and replaces hid_device->ctrl_xfer for an oversized Report Descriptor, then writes the setup packet through its stale local pointer. Physical attachment of a malicious USB HID device is required; the resulting heap overwrite occurs in the USB host task and enables arbitrary code execution.

The record

CVE
CVE-2025-68656
Published
Jan 12, 2026
Updated
Jan 12, 2026
Vendor
Espressif Systems
Product
ESP-USB
Classifications
CWE-416, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 12, 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=< 1.1.0

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Espressif Systems · ESP-USBversion=< 1.1.0

Published CVSS scores

6.8GitHub, Inc.CVSS:3.1/AV:P/AC:L/PR:N/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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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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