Advisoriesby IbisMicrosoftCVE-2026-50381
Microsoft Composite Image File System Driver: type confusion
Fix: upgrade to 10.0.19044.7548 or later (7 fixed versions below)
Access of resource using incompatible type ('type confusion') in Composite Image File System Driver allows an authorized attacker to disclose information locally.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Windows 10 Version 21H2 Product | >= 10.0.19044.0, < 10.0.19044.7548 | 10.0.19044.7548 |
| Windows 10 Version 22H2 Product | >= 10.0.19045.0, < 10.0.19045.7548 | 10.0.19045.7548 |
| Windows 11 Version 24H2 Product | >= 10.0.26100.0, < 10.0.26100.8875 | 10.0.26100.8875 |
| Windows 11 Version 25H2 Product | >= 10.0.26200.0, < 10.0.26200.8875 | 10.0.26200.8875 |
| Windows 11 version 26H1 Product | >= 10.0.28000.0, < 10.0.28000.2525 | 10.0.28000.2525 |
| Windows Server 2022 Product | >= 10.0.20348.0, < 10.0.20348.5386 | 10.0.20348.5386 |
| Windows Server 2025 Product | >= 10.0.26100.0, < 10.0.26100.33158 | 10.0.26100.33158 |
| Windows Server 2025 (Server Core installation) Product | >= 10.0.26100.0, < 10.0.26100.33158 | 10.0.26100.33158 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-843