CVE-2025-59497 Microsoft Defender for Linux Denial of Service Vulnerability
An authorized local attacker can cause a denial of service in Microsoft Defender for Linux via a time-of-check time-of-use race condition.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-59497?
CVE-2025-59497 is a high-severity vulnerability in Microsoft Defender for Endpoint for Linux, published on 14 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Linux allows an authorized attacker to deny service locally.
Weakness: CWE-367
Which versions are affected by CVE-2025-59497?
It affects 1 product.
Products include Microsoft Defender for Endpoint.
How do I fix CVE-2025-59497?
No fix has been published for CVE-2025-59497 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-59497 being exploited?
There is no known exploitation of CVE-2025-59497 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Defender for Endpoint for Linux
- CVE-2026-21537 Microsoft Defender for Endpoint Linux Extension Remote Code Execution Vulnerability
- CVE-2024-49057 Microsoft Defender for Endpoint on Android Spoofing Vulnerability
- CVE-2025-47161 Microsoft Defender for Endpoint Elevation of Privilege Vulnerability
- CVE-2024-21315 Microsoft Defender for Endpoint Protection Elevation of Privilege Vulnerability
- CVE-2022-35828 Microsoft Defender for Endpoint for Mac Elevation of Privilege Vulnerability
Sources
Also known as GHSA-rc6m-rg5w-wv73.