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CVE-2025-62220: Windows Subsystem for Linux GUI Remote Code Execution Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-11-11 · updated 2026-10-18
• Weakness: CWE-122

Description

Heap-based buffer overflow in Windows Subsystem for Linux GUI allows an unauthorized attacker to execute code over a network.

Affected products

• Microsoft Windows Subsystem for Linux (WSL2): before 2.6.2 — fixed in 2.6.2
• Microsoft Windows Subsystem for Linux (WSL2): from 1.0.0 before 2.6.2 — fixed in 2.6.2

How to fix

Upgrade to a fixed version: Microsoft Windows Subsystem for Linux (WSL2) 2.6.2; Microsoft Windows Subsystem for Linux (WSL2) 2.6.2. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62220

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