CVE-2026-80925 Linux CVE debrief

Who should care

Linux kernel developers, administrators, and users who need to assess exposure and apply patches for this vulnerability. Defenders should assess exposure and apply patches for Linux kernel versions affected by this vulnerability. Linux kernel developers and administrators should review and update Linux kernel configurations to prevent similar issues in the future. Users of Linux kernel versions affected by this vulnerability should monitor Linux kernel

Why it matters

A vulnerability in the Linux kernel's VLAN feature has been resolved, and defenders should assess exposure and apply patches to prevent potential issues.

• Defenders should assess exposure and apply patches for Linux kernel versions affected by this vulnerability to prevent potential skb_under_panic issues.
• Linux kernel developers and administrators should review and update Linux kernel configurations to prevent similar issues in the future.
• Users of Linux kernel versions affected by this vulnerability should monitor Linux kernel updates and patches for future vulnerabilities.

Technical summary

The Linux kernel's VLAN feature has a vulnerability that occurs when toggling hardware VLAN TX offload on a lower device. This causes a data race that leads to skb_under_panic and a mismatch between allocated headroom and header creation. The issue has been resolved with patches available. Linux kernel developers and administrators should review and update Linux kernel configurations to prevent similar issues in the future. Users of Linux kernel versions affected by this vulnerability should monitor Linux kernel updates and patches for future vulnerabilities.

Defensive priority

Assess exposure and apply patches for Linux kernel versions affected by this vulnerability.

Recommended defensive actions

• Assess exposure and apply patches for Linux kernel versions affected by this vulnerability.
• Review and update Linux kernel configurations to prevent similar issues.
• Monitor Linux kernel updates and patches for future vulnerabilities.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description and affected versions. The Linux kernel's VLAN feature has a vulnerability that occurs when toggling hardware VLAN TX offload on a lower device. This causes a data race that leads to skb_under_panic and a mismatch between allocated headroom and header creation. The issue has been resolved with patches available. Linux kernel developers, administrators, and users should review and update Linux kernel configurations to prevent similar issues in

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.