CVE-2025-38245

Service interruption via ATM device deregistration race

Published Jul 9, 2025 · Updated May 11, 2026

Race condition in the Linux kernel allows local users to interrupt service through concurrent ATM device registration and removal. atm_dev_deregister releases atm_dev_mutex after deleting a device from the lookup list but before removing its procfs and sysfs entries. Exploitation requires local low-privilege access and repeated ATM ioctl operations; the demonstrated result is a duplicate procfs registration warning and service disruption.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel allows local users to interrupt service through concurrent ATM device registration and removal. atm_dev_deregister releases atm_dev_mutex after deleting a device from the lookup list but before removing its procfs and sysfs entries. Exploitation requires local low-privilege access and repeated ATM ioctl operations; the demonstrated result is a duplicate procfs registration warning and service disruption.

The record

CVE
CVE-2025-38245
Published
Jul 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 9, 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

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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=2.6.15
  2. Affected versionversion=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <26248d5d68c865b888d632162abbf8130645622c
  3. Affected versionversion=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <2a8dcee649d12f69713f2589171a1caf6d4fa439
  4. Affected versionversion=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <4bb1bb438134d9ee6b97cc07289dd7c569092eec
  5. Affected versionversion=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <6922f1a048c090f10704bbef4a3a1e81932d2e0a
  6. Affected versionversion=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <a433791aeaea6e84df709e0b9584b9bbe040cd1c
  7. Affected versionversion=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <ae539d963a17443ec54cba8a767e4ffa318264f4
  8. Affected versionversion=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <b2e40fcfe1575faaa548f87614006d3fe44c779e
  9. Affected versionversion=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <cabed6ba92a9a8c09da02a3f20e32ecd80989896

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.15; version=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <26248d5d68c865b888d632162abbf8130645622c; version=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <2a8dcee649d12f69713f2589171a1caf6d4fa439; version=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <4bb1bb438134d9ee6b97cc07289dd7c569092eec; version=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <6922f1a048c090f10704bbef4a3a1e81932d2e0a; version=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <a433791aeaea6e84df709e0b9584b9bbe040cd1c; version=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <ae539d963a17443ec54cba8a767e4ffa318264f4; version=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <b2e40fcfe1575faaa548f87614006d3fe44c779e; version=64bf69ddff7637b7ed7acf9b2a823cc0ee519439 <cabed6ba92a9a8c09da02a3f20e32ecd80989896

Published CVSS scores

5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Amazon LinuxCVSS: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

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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