---
id: CVE-2025-59497
title: >-
  Time-of-check time-of-use (toctou) race condition in Microsoft Defender for
  Linux allows an authorized attacker to deny service locally.
summary: >-
  Time-of-check time-of-use (toctou) race condition in Microsoft Defender for
  Linux allows an authorized attacker to deny service locally.
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-367
vendor: microsoft
product: defender_for_endpoint
affected:
  - defender_for_endpoint < 101.25032.0010
patched:
  - defender_for_endpoint 101.25032.0010
published: '2025-10-14'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T23:10:00.237'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-59497'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59497'
    label: secure@microsoft.com
tags:
  - nvd
epss: 0.00206
epssPercentile: 0.09586
ingestedAt: '2026-09-30T23:29:32.430Z'
---

## Overview

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

## Affected

- `defender_for_endpoint < 101.25032.0010`

## Remediation

Upgrade past the affected range:

- `defender_for_endpoint 101.25032.0010`