CVE-2025-59497Hinoki check available

Local service interruption via undisclosed TOCTOU race

Published Oct 14, 2025 · Updated Oct 14, 2025

A TOCTOU race in Microsoft Defender for Endpoint for Linux before 101.25032.0010 allows local users to interrupt the service. Microsoft has not disclosed the affected component, the checked resource, or how a local user changes it between validation and use. Exploitation requires local low-privileged access and a successful race; the public record establishes denial of service but does not identify whether the agent hangs, crashes, or stops.

CVSS severity7.0
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A TOCTOU race in Microsoft Defender for Endpoint for Linux before 101.25032.0010 allows local users to interrupt the service. Microsoft has not disclosed the affected component, the checked resource, or how a local user changes it between validation and use. Exploitation requires local low-privileged access and a successful race; the public record establishes denial of service but does not identify whether the agent hangs, crashes, or stops.

The record

CVE
CVE-2025-59497
Published
Oct 14, 2025
Updated
Oct 14, 2025
Vendor
Microsoft
Product
Microsoft Defender for Endpoint for Linux
Classifications
CWE-367, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=101.0.0 <101.25032.0010

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Microsoft Defender for Endpoint for Linuxversion=101.0.0 <101.25032.0010

Published CVSS scores

4.7NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
7.0Microsoft CorporationCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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