What is CVE-2026-63828?

CVE-2026-63828 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. apparmor: mediate the implicit connect of TCP fast open sendmsg

Which CVE IDs does CVE-2026-63828 cover?

CVE-2026-63828 covers the following CVE IDs: CVE-2026-63828. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-63828?

CVE-2026-63828 has a CVSS v3 base score of 9.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-63828?

CVE-2026-63828 affects 1 product, including: azl3 kernel 6.6.143.1-1 on Azure Linux 3.0.

CVE-2026-63828CriticalCVSS 9.8

apparmor: mediate the implicit connect of TCP fast open sendmsg

Vendor

Microsoft Security Response Center (MSRC)

Published

July 23, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-63828 →

🎯 Affected products1

azl3 kernel 6.6.143.1-1 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 6.6.150.1-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63828
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade