High severity7.0NVD Advisory· Published Oct 13, 2026· Updated Oct 13, 2026

CVE-2026-97787

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

Affected products

Microsoft/Windows Container Isolation FS Filter Driverllm-fuzzy

Patches

Vulnerability mechanics

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97787nvd

News mentions

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