CVE-2025-38474

Kernel crash via missing USB endpoint check

Published Jul 28, 2025 · Updated May 11, 2026

Improper endpoint handling in the Linux kernel sierra USB network driver allows local users to crash the system via a crafted USB device. The sierra_net_bind function accepts a three-endpoint interface after checking only bulk input and output, then continues when dev->status is null because no interrupt input endpoint was found. Exploitation requires low-privileged local access and control of USB descriptors that bind to the sierra driver; the established consequence is a kernel crash.

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

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper endpoint handling in the Linux kernel sierra USB network driver allows local users to crash the system via a crafted USB device. The sierra_net_bind function accepts a three-endpoint interface after checking only bulk input and output, then continues when dev->status is null because no interrupt input endpoint was found. Exploitation requires low-privileged local access and control of USB descriptors that bind to the sierra driver; the established consequence is a kernel crash.

The record

CVE
CVE-2025-38474
Published
Jul 28, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-166, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 28, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.34
  2. Affected versionversion=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <0a263ccb905b4ae2af381cd4280bd8d2477b98b8
  3. Affected versionversion=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <4c4ca3c46167518f8534ed70f6e3b4bf86c4d158
  4. Affected versionversion=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <5408cc668e596c81cdd29e137225432aa40d1785
  5. Affected versionversion=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <5849980faea1c792d1d5e54fdbf1e69ac0a9bfb9
  6. Affected versionversion=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <5dd6a441748dad2f02e27b256984ca0b2d4546b6
  7. Affected versionversion=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <65c666aff44eb7f9079c55331abd9687fb77ba2d
  8. Affected versionversion=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <a6a238c4126eb3ddb495d3f960193ca5bb778d92
  9. Affected versionversion=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <bfe8ef373986e8f185d3d6613eb1801a8749837a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.34; version=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <0a263ccb905b4ae2af381cd4280bd8d2477b98b8; version=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <4c4ca3c46167518f8534ed70f6e3b4bf86c4d158; version=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <5408cc668e596c81cdd29e137225432aa40d1785; version=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <5849980faea1c792d1d5e54fdbf1e69ac0a9bfb9; version=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <5dd6a441748dad2f02e27b256984ca0b2d4546b6; version=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <65c666aff44eb7f9079c55331abd9687fb77ba2d; version=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <a6a238c4126eb3ddb495d3f960193ca5bb778d92; version=eb4fd8cd355c8ec425a12ec6cbdac614e8a4819d <bfe8ef373986e8f185d3d6613eb1801a8749837a

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.0OracleCVSS:3.1/AV:L/AC:H/PR:L/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 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-166Improper Handling of Missing Special Element
T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo