CVE-2026-72483

Hub-state corruption via unchecked bit shift

Published Aug 15, 2026 · Updated Aug 15, 2026

Incorrect bit shifting in the Linux kernel MAX3421 USB host driver allows local users to corrupt virtual root-hub port status. In max3421_hub_control(), the ClearPortFeature and SetPortFeature default paths shift 1 by unchecked wValue before OR-ing it into port_status. The caller needs local access to the root hub through /dev/bus/usb and a wValue of at least 32; the undefined shift can alter normally immutable change bits, bypass state checks, and confuse hub status.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect bit shifting in the Linux kernel MAX3421 USB host driver allows local users to corrupt virtual root-hub port status. In max3421_hub_control(), the ClearPortFeature and SetPortFeature default paths shift 1 by unchecked wValue before OR-ing it into port_status. The caller needs local access to the root hub through /dev/bus/usb and a wValue of at least 32; the undefined shift can alter normally immutable change bits, bypass state checks, and confuse hub status.

The record

CVE
CVE-2026-72483
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-1335, CWE-682
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=2d53139f31626bad6f8983d8e519ddde2cbba921 <00dd025324b56d39d37e57a08f473dab3a660f30
  2. Affected versionversion=2d53139f31626bad6f8983d8e519ddde2cbba921 <02d03c61e8a7b016956acb48e8a2512d16d87517
  3. Affected versionversion=2d53139f31626bad6f8983d8e519ddde2cbba921 <08b1d4cab0230697bc74c63fc4e40170a7559c54
  4. Affected versionversion=2d53139f31626bad6f8983d8e519ddde2cbba921 <3be5f24e8270ba53b3c814d13689bb8644c86237
  5. Affected versionversion=2d53139f31626bad6f8983d8e519ddde2cbba921 <4da073d57176d8e1c2bca34febfbc81d2560c1a5
  6. Affected versionversion=2d53139f31626bad6f8983d8e519ddde2cbba921 <cff06b03b530ae1fe8a13e93a7848f2130e00fb4
  7. Affected versionversion=2d53139f31626bad6f8983d8e519ddde2cbba921 <d512bdefd241b98f4d7bcb5bab5614a86411fad4
  8. Affected versionversion=2d53139f31626bad6f8983d8e519ddde2cbba921 <e5fa9d8f40746ec3447335c9642c03410f5fd3af
  9. Affected versionversion=3.16

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2d53139f31626bad6f8983d8e519ddde2cbba921 <00dd025324b56d39d37e57a08f473dab3a660f30; version=2d53139f31626bad6f8983d8e519ddde2cbba921 <02d03c61e8a7b016956acb48e8a2512d16d87517; version=2d53139f31626bad6f8983d8e519ddde2cbba921 <08b1d4cab0230697bc74c63fc4e40170a7559c54; version=2d53139f31626bad6f8983d8e519ddde2cbba921 <3be5f24e8270ba53b3c814d13689bb8644c86237; version=2d53139f31626bad6f8983d8e519ddde2cbba921 <4da073d57176d8e1c2bca34febfbc81d2560c1a5; version=2d53139f31626bad6f8983d8e519ddde2cbba921 <cff06b03b530ae1fe8a13e93a7848f2130e00fb4; version=2d53139f31626bad6f8983d8e519ddde2cbba921 <d512bdefd241b98f4d7bcb5bab5614a86411fad4; version=2d53139f31626bad6f8983d8e519ddde2cbba921 <e5fa9d8f40746ec3447335c9642c03410f5fd3af; version=3.16

Published CVSS scores

7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-1335Incorrect Bitwise Shift of Integer
CWE-682Incorrect Calculation

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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