CVE-2026-64341

Kernel code execution via USB disconnect race

Published Jul 25, 2026 · Updated Jul 25, 2026

Use-after-free in the Linux Kernel USB iowarrior driver allows local users to crash the system or execute arbitrary code. During a race between release() and disconnect(), mutex_unlock() accesses the driver-data mutex after the object can be freed because the mutex is used as a lifetime guard. Exploitation requires low-privileged local access and an affected iowarrior USB device; a successful race can corrupt kernel memory, crash the host, or run code in kernel context.

CVSS severity7.0
High
EPSS probability0.12%
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 the Linux Kernel USB iowarrior driver allows local users to crash the system or execute arbitrary code. During a race between release() and disconnect(), mutex_unlock() accesses the driver-data mutex after the object can be freed because the mutex is used as a lifetime guard. Exploitation requires low-privileged local access and an affected iowarrior USB device; a successful race can corrupt kernel memory, crash the host, or run code in kernel context.

The record

CVE
CVE-2026-64341
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-825, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=2.6.21
  2. Affected versionversion=946b960d13c15f050a3b848987aaca79f6a459b7 <3c0a7b29ebb391d5f50b115e86f842b709195b08
  3. Affected versionversion=946b960d13c15f050a3b848987aaca79f6a459b7 <71590982700fdeb39a37a500c877228b0140978e
  4. Affected versionversion=946b960d13c15f050a3b848987aaca79f6a459b7 <c602254ba4c10f60a73cd99d147874f86a3f485c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2.6.21; version=946b960d13c15f050a3b848987aaca79f6a459b7 <3c0a7b29ebb391d5f50b115e86f842b709195b08; version=946b960d13c15f050a3b848987aaca79f6a459b7 <71590982700fdeb39a37a500c877228b0140978e; version=946b960d13c15f050a3b848987aaca79f6a459b7 <c602254ba4c10f60a73cd99d147874f86a3f485c

Published CVSS scores

7.0Red HatCVSS: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 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

CWE-825Expired Pointer Dereference
T1068Exploitation for Privilege Escalation

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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