CVE-2024-30046Network attack vector

Application hang via Kestrel Core deadlock

Published May 14, 2024 · Updated May 3, 2025

Race condition in Kestrel Core bundled with affected Microsoft .NET and Visual Studio releases allows remote attackers to hang applications. Microsoft has disclosed only that Microsoft.AspNetCore.Server.Kestrel.Core.dll can enter a deadlock, not the request or synchronization error that triggers it. Exploitation is unauthenticated over a network but requires high-complexity conditions, and the reported consequence is an application hang.

CVSS severity5.9
Medium
EPSS probability1.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Kestrel Core bundled with affected Microsoft .NET and Visual Studio releases allows remote attackers to hang applications. Microsoft has disclosed only that Microsoft.AspNetCore.Server.Kestrel.Core.dll can enter a deadlock, not the request or synchronization error that triggers it. Exploitation is unauthenticated over a network but requires high-complexity conditions, and the reported consequence is an application hang.

The record

CVE
CVE-2024-30046
Published
May 14, 2024
Updated
May 3, 2025
Vendor
Microsoft
Product
Microsoft Visual Studio 2022 version 17.8
Classifications
CWE-362, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2024CVE publishedPublication date reported by the CVE source.
  2. May 3, 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=17.8.0 <17.8.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Visual Studio 2022 version 17.8version=17.8.0 <17.8.10
Microsoft · Microsoft Visual Studio 2022 version 17.6version=17.6.0 <17.6.15
Microsoft · Microsoft Visual Studio 2022 version 17.4version=17.4.0 <17.4.19
Microsoft · .NET 8.0version=8.0 <8.0.5
Microsoft · .NET 7.0version=7.0.0 <7.0.19
Microsoft · Microsoft Visual Studio 2022 version 17.9version=17.0 <17.9.7

Published CVSS scores

5.9Microsoft CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('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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