CVE-2022-4382Public exploit

System crash via gadgetfs superblock race

Published Jan 10, 2023 · Updated Apr 9, 2025

Use-after-free in Linux Kernel gadgetfs allows local users to crash the system by concurrently mounting and unmounting gadgetfs. gadgetfs_kill_sb() can free the_device while gadgetfs_fill_super() still uses it because the two superblock paths lack serialization. Exploitation requires gadgetfs, which Ubuntu does not mount by default, and concurrent mount and unmount activity on USB device-side hardware; the demonstrated consequence is a kernel crash.

CVSS severity6.4
Medium
EPSS probability0.48%
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

Use-after-free in Linux Kernel gadgetfs allows local users to crash the system by concurrently mounting and unmounting gadgetfs. gadgetfs_kill_sb() can free the_device while gadgetfs_fill_super() still uses it because the two superblock paths lack serialization. Exploitation requires gadgetfs, which Ubuntu does not mount by default, and concurrent mount and unmount activity on USB device-side hardware; the demonstrated consequence is a kernel crash.

The record

CVE
CVE-2022-4382
Published
Jan 10, 2023
Updated
Apr 9, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 2025Record 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=unknown

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=unknown

Published CVSS scores

6.4CISA-ADPCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.4SUSECVSS:3.1/AV:L/AC:H/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 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 exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

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