Vulnerability in Microsoft Defender For Endpoint Linux
CVE-2025-59497
Time-of-check time-of-use (toctou) race condition in Microsoft Defender for Linux allows an authorized attacker to deny service locally.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
EPSS: 0.000 (9.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.
Affected products
- Microsoft Defender For Endpoint Linux — versions 101.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- Microsoft Defender for Linux Denial of Service Vulnerability (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2025-59497?
- CVE-2025-59497 is a high-severity vulnerability in Microsoft Defender For Endpoint Linux, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.0/10. Published 2025-10-14.
- How severe is CVE-2025-59497?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2025-59497 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.