apparmor: fix memory leak in verify_header — CVE-2026-23403

Summary

CVE-2026-23403 is a advisory from MSRC. apparmor: fix memory leak in verify_header Vendor: Microsoft. Severity/Threat: medium. Source updated on 2026-04-18.

What to do

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

• Review exposure and plan remediation based on risk and environment.
• 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
• CVE Record
• NVD

Related advisories