fs: init flags_valid before calling vfs_fileattr_get

🔗 CVE IDs covered (1)

🎯 Affected products1

• azl3 kernel 6.6.137.1-2 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 6.6.138.1-1

🔗 References (2)

• advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43474
• referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade