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CVE-2026-96206: Windows Subsystem for Linux Information Disclosure Vulnerability

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-13 · updated 2026-10-31
• Weakness: CWE-908

Description

Use of uninitialized resource in Windows Subsystem for Linux allows an authorized attacker to disclose information locally.

Affected products

• Microsoft Windows Subsystem for Linux (WSL2): before 3.0.1 — fixed in 3.0.1
• Microsoft Windows Subsystem for Linux (WSL2): from 5.0.0.0 before 3.0.1 — fixed in 3.0.1

How to fix

Upgrade to a fixed version: Microsoft Windows Subsystem for Linux (WSL2) 3.0.1; Microsoft Windows Subsystem for Linux (WSL2) 3.0.1. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96206

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