CVE-2026-97810 | Microsoft Windows up to Server 2025 Windows Container Isolation FS Filter Driver unionfs.sys heap-based overflow

October 14, 2026 Yanac

A vulnerability classified as very critical has been found in Microsoft Windows up to Server 2025. This issue affects some unknown processing of the file unionfs.sys of the component Windows Container Isolation FS Filter Driver. Performing a manipulation results in heap-based buffer overflow.

This vulnerability is known as CVE-2026-97810. Attacking locally is a requirement. No exploit is available.

It is recommended to apply a patch to fix this issue.VulDB Recent EntriesRead More