CVE-2026-80612Network attack vector

Packet metadata corruption via LWT encapsulation

Published Aug 28, 2026 · Updated Aug 28, 2026

Packet metadata corruption in Linux 6.19 allows remote attackers to overwrite or clear XDP metadata during LWT encapsulation. Non-BPF lwtunnel dispatchers push outer headers over metadata in skb headroom, while BPF transmit calls skb_data_move with metadata ending at the stale MAC header rather than immediately before skb data. Reachability requires an RX-originated forwarded packet that retains XDP metadata and traverses an LWT input, output, or transmit redirect; reported effects are metadata loss or overwrite and a kernel warning.

CVSS severityUnavailable
Unscored
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Packet metadata corruption in Linux 6.19 allows remote attackers to overwrite or clear XDP metadata during LWT encapsulation. Non-BPF lwtunnel dispatchers push outer headers over metadata in skb headroom, while BPF transmit calls skb_data_move with metadata ending at the stale MAC header rather than immediately before skb data. Reachability requires an RX-originated forwarded packet that retains XDP metadata and traverses an LWT input, output, or transmit redirect; reported effects are metadata loss or overwrite and a kernel warning.

The record

CVE
CVE-2026-80612
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=6.19
  2. Affected versionversion=8989d328dfe7c7a3b9f4b9f0ef60006d277f81cc <19eec11f3ab5dd29ba58f5f209c24e946c95ef12
  3. Affected versionversion=8989d328dfe7c7a3b9f4b9f0ef60006d277f81cc <c00320b0e355c4bf0ae4743a53b4180fea237546

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.19; version=8989d328dfe7c7a3b9f4b9f0ef60006d277f81cc <19eec11f3ab5dd29ba58f5f209c24e946c95ef12; version=8989d328dfe7c7a3b9f4b9f0ef60006d277f81cc <c00320b0e355c4bf0ae4743a53b4180fea237546

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

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)
Vectornetwork
PrivilegesUnavailable
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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