CVE-2016-20022

Service interruption via oversized USB endpoint descriptor

Published Jun 27, 2024 · Updated Mar 13, 2025

Out-of-bounds read in the Linux kernel before 4.8 allows physically proximate attackers to cause a service interrupt via a crafted USB device. The usb_parse_endpoint function in drivers/usb/core/config.c accepts reserved bits and out-of-range wMaxPacketSize values without checking them against endpoint type and device speed limits. Exploitation requires presenting a malicious endpoint descriptor through a USB device, and public sources do not specify whether the resulting interruption is a hang or crash.

CVSS severity8.4
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux kernel before 4.8 allows physically proximate attackers to cause a service interrupt via a crafted USB device. The usb_parse_endpoint function in drivers/usb/core/config.c accepts reserved bits and out-of-range wMaxPacketSize values without checking them against endpoint type and device speed limits. Exploitation requires presenting a malicious endpoint descriptor through a USB device, and public sources do not specify whether the resulting interruption is a hang or crash.

The record

CVE
CVE-2016-20022
Published
Jun 27, 2024
Updated
Mar 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1200
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.2Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.4CISA-ADPCVSS:3.1/AV:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
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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