CVE-2025-68815Public exploit

State corruption via duplicate ETS list insertion

Published Jan 13, 2026 · Updated Jan 13, 2026

List corruption in Linux Kernel 5.14 allows local users to duplicate an ETS class in the active list through qdisc reconfiguration. In ets_qdisc_change, a DRR-to-strict transition fails to unlink an active class, so a later strict-to-DRR transition inserts the same list node again. Local authority to change the ETS qdisc is required; the published reproducer demonstrates a kernel warning with list debugging, not a crash or privilege gain.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

List corruption in Linux Kernel 5.14 allows local users to duplicate an ETS class in the active list through qdisc reconfiguration. In ets_qdisc_change, a DRR-to-strict transition fails to unlink an active class, so a later strict-to-DRR transition inserts the same list node again. Local authority to change the ETS qdisc is required; the published reproducer demonstrates a kernel warning with list debugging, not a crash or privilege gain.

The record

CVE
CVE-2025-68815
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

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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=5.14
  2. Affected versionversion=cd9b50adc6bb9ad3f7d244590a389522215865c4 <2f125ebe47d6369e562f3cbd9b6227cff51eaf34
  3. Affected versionversion=cd9b50adc6bb9ad3f7d244590a389522215865c4 <43d9a530c8c094d137159784e7c951c65f11ec6c
  4. Affected versionversion=cd9b50adc6bb9ad3f7d244590a389522215865c4 <8067db5c95aab9461d23117679338cd8869831fa
  5. Affected versionversion=cd9b50adc6bb9ad3f7d244590a389522215865c4 <b1e125ae425aba9b45252e933ca8df52a843ec70
  6. Affected versionversion=cd9b50adc6bb9ad3f7d244590a389522215865c4 <cca2ed931b734fe48139bc6f020e47367346630f
  7. Affected versionversion=d05330672afe2e142ba97e63bd7c1faef76781bb
  8. Affected versionversion=f517335a61ff8037b18ba1b0a002c1f82926a934

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.14; version=cd9b50adc6bb9ad3f7d244590a389522215865c4 <2f125ebe47d6369e562f3cbd9b6227cff51eaf34; version=cd9b50adc6bb9ad3f7d244590a389522215865c4 <43d9a530c8c094d137159784e7c951c65f11ec6c; version=cd9b50adc6bb9ad3f7d244590a389522215865c4 <8067db5c95aab9461d23117679338cd8869831fa; version=cd9b50adc6bb9ad3f7d244590a389522215865c4 <b1e125ae425aba9b45252e933ca8df52a843ec70; version=cd9b50adc6bb9ad3f7d244590a389522215865c4 <cca2ed931b734fe48139bc6f020e47367346630f; version=d05330672afe2e142ba97e63bd7c1faef76781bb; version=f517335a61ff8037b18ba1b0a002c1f82926a934

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/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.

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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 exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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Technologies

Your stack

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Your stack

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