ext4: don't zero the entire extent if EXT4_EXT_DATA_PARTIAL_VALID1

Scope

What the vendor says is affected

• azl3 kernel 6.6.139.1-1 on Azure Linux 3.0

Timeline

When this advisory changed

1. May 28, 2026 at 1:11 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Sep 27, 2026 at 11:11 PM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-45858View CVSS, KEV, EPSS, and threat context