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VulnerabilityPublished Updated

CVE-2025-38105: Linux kernel · ALSA: usb-audio: Kill timer properly at removal

Affects Linux kernelSource GCVE Database

0

Not known to be exploited · CVSS 5.5 Medium · fixed in 5.15.0-186.196~20.04.1 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.15.0-186.196~20.04.1, 5.15.0-184.194~20.04.1, 5.15.0-1064.66~20.04.1 +46
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Jul 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde@6.17.0-1017.17?arch=source&distro=questingOther threatsAffected
  • 6.17.0-1003.3 – 6.17.0-1017.17
10 affected builds
Fixed in–
Ubuntu 24.04 LTSlinuxpkg:deb/ubuntu/linux@6.8.0-106.106?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-106.106
Fixed in
  • 6.8.0-106.106
Ubuntu 24.04 LTSlinux-awspkg:deb/ubuntu/linux-aws@6.8.0-1050.53?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1050.53
Fixed in
  • 6.8.0-1050.53
Ubuntu 24.04 LTSlinux-aws-6.14pkg:deb/ubuntu/linux-aws-6.14@6.14.0-1013.13~24.04.1?arch=source&distro=nobleOther threatsAffected
  • <6.14.0-1013.13~24.04.1
Fixed in
  • 6.14.0-1013.13~24.04.1
Ubuntu 24.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure@6.8.0-1051.57?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1051.57
Fixed in
  • 6.8.0-1051.57
Ubuntu 24.04 LTSlinux-azure-6.11pkg:deb/ubuntu/linux-azure-6.11@6.11.0-1018.18~24.04.1?arch=source&distro=nobleOther threatsAffected
  • 6.11.0-1008.8~24.04.1 – 6.11.0-1018.18~24.04.1
7 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available and should be applied. The fix involves updating the Linux kernel to a version that includes the corrected timer shutdown logic in the ALSA USB-audio MIDI driver. Users should follow vendor advisories such as the Ubuntu Security Notice USN-7769-1 for updated kernel packages. No additional mitigation is required beyond applying the official fix.

Description

A vulnerability in the Linux kernel's ALSA USB-audio MIDI driver was resolved by properly shutting down a timer during driver removal. The issue occurs when the driver is freed without a disconnect call, leaving an active timer on a released object, causing kernel warnings under debug configurations. This flaw has been fixed by adding timer shutdown calls in the appropriate driver cleanup functions.

References

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