What’s Vulnerable › Vulnerabilities

CVE-2025-59497: Microsoft Defender for Linux Denial of Service Vulnerability

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-14 · updated 2026-10-08
• Weakness: CWE-367

Description

Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Linux allows an authorized attacker to deny service locally.

Affected products

• Microsoft Defender for Endpoint for Linux: before 101.25032.0010 — fixed in 101.25032.0010
• Microsoft Defender for Endpoint for Linux: from 101.0.0 before 101.25032.0010 — fixed in 101.25032.0010

How to fix

Upgrade to a fixed version: Microsoft Defender for Endpoint for Linux 101.25032.0010; Microsoft Defender for Endpoint for Linux 101.25032.0010. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59497

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