CVE-2025-68783

System crash via unchecked meter packet index

Published Jan 13, 2026 · Updated Jan 13, 2026

Out-of-bounds write in the Linux Kernel ALSA USB mixer driver allows local users to crash the system through malformed meter packets. get_meter_levels_from_urb() subtracts one from a device-supplied channel number and uses the unchecked result to index meter_level, comp_level, and master_level arrays. The published assessment requires low-privileged local access and the affected TASCAM US-16x08 USB mixer path; reported impact is limited to availability.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in the Linux Kernel ALSA USB mixer driver allows local users to crash the system through malformed meter packets. get_meter_levels_from_urb() subtracts one from a device-supplied channel number and uses the unchecked result to index meter_level, comp_level, and master_level arrays. The published assessment requires low-privileged local access and the affected TASCAM US-16x08 USB mixer path; reported impact is limited to availability.

The record

CVE
CVE-2025-68783
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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=4.11
  2. Affected versionversion=d2bb390a2081a36ffe906724d2848d846f2aeb29 <2f21a7cbaaa93926f5be15bc095b9c57c35748d9
  3. Affected versionversion=d2bb390a2081a36ffe906724d2848d846f2aeb29 <5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e
  4. Affected versionversion=d2bb390a2081a36ffe906724d2848d846f2aeb29 <a8ad320efb663be30b794e3dd3e829301c0d0ed3
  5. Affected versionversion=d2bb390a2081a36ffe906724d2848d846f2aeb29 <cde47f4ccad6751ac36b7471572ddf38ee91870c
  6. Affected versionversion=d2bb390a2081a36ffe906724d2848d846f2aeb29 <eaa95228b8a56c4880a182c0350d67922b22408f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.11; version=d2bb390a2081a36ffe906724d2848d846f2aeb29 <2f21a7cbaaa93926f5be15bc095b9c57c35748d9; version=d2bb390a2081a36ffe906724d2848d846f2aeb29 <5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e; version=d2bb390a2081a36ffe906724d2848d846f2aeb29 <a8ad320efb663be30b794e3dd3e829301c0d0ed3; version=d2bb390a2081a36ffe906724d2848d846f2aeb29 <cde47f4ccad6751ac36b7471572ddf38ee91870c; version=d2bb390a2081a36ffe906724d2848d846f2aeb29 <eaa95228b8a56c4880a182c0350d67922b22408f

Published CVSS scores

5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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

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

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Your stack

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