CVE-2025-68200

Kernel warning via BPF control-block collision

Published Dec 16, 2025 · Updated Dec 16, 2025

Improper BPF state handling in Linux allows local users to trigger a kernel warning through a traffic-control BPF classifier. cls_bpf_classify() lets BPF data_meta and data_end overwrite shared net_sched control-block storage, including drop_reason, because that storage is not preserved around program execution. Reaching the classifier requires privileged BPF and traffic-control access, and the documented consequence is a warning rather than a crash.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper BPF state handling in Linux allows local users to trigger a kernel warning through a traffic-control BPF classifier. cls_bpf_classify() lets BPF data_meta and data_end overwrite shared net_sched control-block storage, including drop_reason, because that storage is not preserved around program execution. Reaching the classifier requires privileged BPF and traffic-control access, and the documented consequence is a warning rather than a crash.

The record

CVE
CVE-2025-68200
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 2025Record 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=0d76daf2013ce1da20eab5e26bd81d983e1c18fb <c4cdd143c35974a2cedd000fa9eb3accc3023b20
  2. Affected versionversion=5.16
  3. Affected versionversion=ec624fe740b416fb68d536b37fb8eef46f90b5c2 <4ef92743625818932b9c320152b58274c05e5053
  4. Affected versionversion=ec624fe740b416fb68d536b37fb8eef46f90b5c2 <5e149d8a8e732126fb6014efd60075cf63a73f91
  5. Affected versionversion=ec624fe740b416fb68d536b37fb8eef46f90b5c2 <6392e5f4b1a3cce10e828309baf35d22abd3457d
  6. Affected versionversion=ec624fe740b416fb68d536b37fb8eef46f90b5c2 <8dd2fe5f5d586c8e87307b7a271f6b994afcc006
  7. Affected versionversion=ec624fe740b416fb68d536b37fb8eef46f90b5c2 <baa61dcaa50b7141048c8d2aede7fe9ed8f21d11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=0d76daf2013ce1da20eab5e26bd81d983e1c18fb <c4cdd143c35974a2cedd000fa9eb3accc3023b20; version=5.16; version=ec624fe740b416fb68d536b37fb8eef46f90b5c2 <4ef92743625818932b9c320152b58274c05e5053; version=ec624fe740b416fb68d536b37fb8eef46f90b5c2 <5e149d8a8e732126fb6014efd60075cf63a73f91; version=ec624fe740b416fb68d536b37fb8eef46f90b5c2 <6392e5f4b1a3cce10e828309baf35d22abd3457d; version=ec624fe740b416fb68d536b37fb8eef46f90b5c2 <8dd2fe5f5d586c8e87307b7a271f6b994afcc006; version=ec624fe740b416fb68d536b37fb8eef46f90b5c2 <baa61dcaa50b7141048c8d2aede7fe9ed8f21d11

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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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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