What is CVE-2025-39770?

CVE-2025-39770 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. net: gso: Forbid IPv6 TSO with extensions on devices with only IPV6_CSUM

Which CVE IDs does CVE-2025-39770 cover?

CVE-2025-39770 covers the following CVE IDs: CVE-2025-39770. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2025-39770?

CVE-2025-39770 has a CVSS v3 base score of 5.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2025-39770?

CVE-2025-39770 affects 5 products, including: cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0; cbl2 kernel 5.15.200.1-1 on CBL Mariner 2.0; cbl2 kernel 5.15.202.1-1; cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0; cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0.

CVE-2025-39770MediumCVSS 5.5

net: gso: Forbid IPv6 TSO with extensions on devices with only IPV6_CSUM

Vendor

Microsoft Security Response Center (MSRC)

Published

June 3, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2025-39770 →

🎯 Affected products5

cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0
cbl2 kernel 5.15.200.1-1 on CBL Mariner 2.0
cbl2 kernel 5.15.202.1-1
cbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0
cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-39770
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade