CVE-2025-38105

Kernel warning via active timer after object release

Published Jul 3, 2025 · Updated Jun 1, 2026

Use-after-free in the ALSA USB-MIDI driver in affected Linux kernels allows local users to trigger a kernel warning during removal. The snd_usbmidi_free() path frees the USB-MIDI object without first shutting down error_timer, leaving the timer active against released storage. The rare path requires driver removal without the disconnect callback; published evidence demonstrates a debug-kernel warning, not data access or system compromise.

CVSS severity5.5
Medium
EPSS probability0.17%
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 the ALSA USB-MIDI driver in affected Linux kernels allows local users to trigger a kernel warning during removal. The snd_usbmidi_free() path frees the USB-MIDI object without first shutting down error_timer, leaving the timer active against released storage. The rare path requires driver removal without the disconnect callback; published evidence demonstrates a debug-kernel warning, not data access or system compromise.

The record

CVE
CVE-2025-38105
Published
Jul 3, 2025
Updated
Jun 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 1, 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=2.6.14
  2. Affected versionversion=c88469704d63787e8d44ca5ea1c1bd0adc29572d <06513dd6d32c37d0364db8488cfdf3e14da238a8
  3. Affected versionversion=c88469704d63787e8d44ca5ea1c1bd0adc29572d <0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1
  4. Affected versionversion=c88469704d63787e8d44ca5ea1c1bd0adc29572d <62066758d2ae169278e5d6aea5995b1b6f6ddeb5
  5. Affected versionversion=c88469704d63787e8d44ca5ea1c1bd0adc29572d <647410a7da46067953a53c0d03f8680eff570959
  6. Affected versionversion=c88469704d63787e8d44ca5ea1c1bd0adc29572d <c611b9e55174e439dcd85a72969b43a95f3827a4
  7. Affected versionversion=c88469704d63787e8d44ca5ea1c1bd0adc29572d <efaf61052b8ff9ee8968912fbaf02c2847c78ede

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.14; version=c88469704d63787e8d44ca5ea1c1bd0adc29572d <06513dd6d32c37d0364db8488cfdf3e14da238a8; version=c88469704d63787e8d44ca5ea1c1bd0adc29572d <0718a78f6a9f04b88d0dc9616cc216b31c5f3cf1; version=c88469704d63787e8d44ca5ea1c1bd0adc29572d <62066758d2ae169278e5d6aea5995b1b6f6ddeb5; version=c88469704d63787e8d44ca5ea1c1bd0adc29572d <647410a7da46067953a53c0d03f8680eff570959; version=c88469704d63787e8d44ca5ea1c1bd0adc29572d <c611b9e55174e439dcd85a72969b43a95f3827a4; version=c88469704d63787e8d44ca5ea1c1bd0adc29572d <efaf61052b8ff9ee8968912fbaf02c2847c78ede

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5UbuntuCVSS: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

No sourced classifications are available.

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