CVE-2025-71094

Service interruption via unchecked USB PHY address

Published Jan 13, 2026 · Updated Jan 13, 2026

Improper PHY address validation in the Linux Kernel ASIX USB network driver allows local users to interrupt service through a malicious USB device. The device-supplied address reaches mdiobus_get_phy() without a PHY_MAX_ADDR bounds check, triggering an out-of-range warning. Exploitation requires a crafted ASIX USB device and access sufficient to make the kernel probe it; the published impact is availability only.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper PHY address validation in the Linux Kernel ASIX USB network driver allows local users to interrupt service through a malicious USB device. The device-supplied address reaches mdiobus_get_phy() without a PHY_MAX_ADDR bounds check, triggering an out-of-range warning. Exploitation requires a crafted ASIX USB device and access sufficient to make the kernel probe it; the published impact is availability only.

The record

CVE
CVE-2025-71094
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=4e4f3cb41d687bd64cd03358862b23c84d82329e
  2. Affected versionversion=5.14
  3. Affected versionversion=7e88b11a862afe59ee0c365123ea5fb96a26cb3b <38722e69ee64dbb020028c93898d25d6f4c0e0b2
  4. Affected versionversion=7e88b11a862afe59ee0c365123ea5fb96a26cb3b <98a12c2547a44a5f03f35c108d2022cc652cbc4d
  5. Affected versionversion=7e88b11a862afe59ee0c365123ea5fb96a26cb3b <a1e077a3f76eea0dc671ed6792e7d543946227e8
  6. Affected versionversion=7e88b11a862afe59ee0c365123ea5fb96a26cb3b <bf8a0f3b787ca7c5889bfca12c60c483041fbee3
  7. Affected versionversion=7e88b11a862afe59ee0c365123ea5fb96a26cb3b <f5f4f30f3811d37e1aa48667c36add74e5a8d99f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4e4f3cb41d687bd64cd03358862b23c84d82329e; version=5.14; version=7e88b11a862afe59ee0c365123ea5fb96a26cb3b <38722e69ee64dbb020028c93898d25d6f4c0e0b2; version=7e88b11a862afe59ee0c365123ea5fb96a26cb3b <98a12c2547a44a5f03f35c108d2022cc652cbc4d; version=7e88b11a862afe59ee0c365123ea5fb96a26cb3b <a1e077a3f76eea0dc671ed6792e7d543946227e8; version=7e88b11a862afe59ee0c365123ea5fb96a26cb3b <bf8a0f3b787ca7c5889bfca12c60c483041fbee3; version=7e88b11a862afe59ee0c365123ea5fb96a26cb3b <f5f4f30f3811d37e1aa48667c36add74e5a8d99f

Published CVSS scores

5.5NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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