net, hsr: reject HSR frame if skb can't hold tag — CVE-2025-39703

Summary

Advisory CVE-2025-39703. net, hsr: reject HSR frame if skb can't hold tag Vendor: Microsoft. Source: MSRC. Threat: high. CVSS 7. See the official advisory for details.

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

Read the official source

Related advisories