What is CVE-2026-44809?

CVE-2026-44809 is a high-severity vulnerability in Microsoft Windows_11_24h2, classified under Use After Free. CVSS score: 7.8/10. Published 2026-06-09.

How severe is CVE-2026-44809?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Microsoft Windows_11_24h2

CVE-2026-44809

Use after free in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Microsoft Windows_11_24h2
Microsoft Windows_11_25h2
Microsoft Windows_11_26h1
Microsoft Windows_server_2025

Weakness classification (CWE)

CWE-416 — Use After Free

References

secure@microsoft.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-44809?: CVE-2026-44809 is a high-severity vulnerability in Microsoft Windows_11_24h2, classified under Use After Free. CVSS score: 7.8/10. Published 2026-06-09.
How severe is CVE-2026-44809?: High severity. CVSS v3 base score is 7.8 out of 10.