SB2025101484 - Denial of service in Microsoft Defender for Linux
Published: October 14, 2025
Security Bulletin ID
SB2025101484
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2025-59497)
CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a time-of-check, time-of-use (TOCTOU) race condition in Microsoft Defender for Linux. A local user can win a race condition and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.