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Purlpkg:nuget/Microsoft.NETCore.App.Runtime.rhel.6-x64@3.1.16
Typenuget
Namespace
NameMicrosoft.NETCore.App.Runtime.rhel.6-x64
Version3.1.16
Qualifiers
Subpath
Is_vulnerabletrue
Next_non_vulnerable_version3.1.18
Latest_non_vulnerable_version3.1.18
Affected_by_vulnerabilities
0
url VCID-4rcu-jd6x-ufeu
vulnerability_id VCID-4rcu-jd6x-ufeu
summary 
.NET Core Elevation of Privilege Vulnerability
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 5.0 and .NET Core 3.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

A denial of service vulnerability exists in .NET 5.0, .NET Core 3.1 and .NET Core 2.1 where .NET (Core) server applications providing WebSocket endpoints could be tricked into endlessly looping while trying to read a single WebSocket frame. 

### Patches

* If you're using .NET 5.0, you should download and install Runtime 5.0.9 or SDK 5.0.206 (for Visual Studio 2019 v16.8) or SDK 5.0.303 (for Visual Studio 2019 V16.10) from https://dotnet.microsoft.com/download/dotnet-core/5.0.

* If you're using .NET Core 3.1, you should download and install Runtime 3.1.18 or SDK 3.1.118 (for Visual Studio 2019 v16.4) or 3.1.412 (for Visual Studio 2019 v16.7 or later) from https://dotnet.microsoft.com/download/dotnet-core/3.1.

* If you're using .NET Core 2.1, you should download and install Runtime 2.1.29 or SDK 2.1.525 (for Visual Studio 2019 v15.9) or 2.1.817 from https://dotnet.microsoft.com/download/dotnet-core/2.1.


#### Other Details

- Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/194
- An Issue for this can be found at https://github.com/dotnet/runtime/issues/57175
- MSRC details for this can be found at https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26423
references
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scoring_system cvssv3
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-26423.json
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published_at 2026-04-16T12:55:00Z
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reference_url https://github.com/dotnet/announcements/issues/194
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reference_url https://github.com/dotnet/runtime/security/advisories/GHSA-rh58-r7jh-xhx3
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reference_type
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fixed_packages
0
url pkg:nuget/Microsoft.NETCore.App.Runtime.rhel.6-x64@3.1.18
purl pkg:nuget/Microsoft.NETCore.App.Runtime.rhel.6-x64@3.1.18
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:nuget/Microsoft.NETCore.App.Runtime.rhel.6-x64@3.1.18
aliases CVE-2021-26423, GHSA-rh58-r7jh-xhx3
risk_score 4.0
exploitability 0.5
weighted_severity 8.0
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-4rcu-jd6x-ufeu
1
url VCID-du1r-hgyq-z7c7
vulnerability_id VCID-du1r-hgyq-z7c7
summary 
.NET Core Information Disclosure Vulnerability
Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 5.0, .NET Core 3.1 and .NET Core 2.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

An information disclosure vulnerability exists in .NET 5.0, .NET Core 3.1 and .NET Core 2.1 when dumps created by the tool to collect crash dumps and dumps on demand are created with global read permissions on Linux and macOS.

### Patches

* If you're using .NET 5.0, you should download and install Runtime 5.0.9 or SDK 5.0.206 (for Visual Studio 2019 v16.8) or SDK 5.0.303 (for Visual Studio 2019 V16.10) from https://dotnet.microsoft.com/download/dotnet-core/5.0.

* If you're using .NET Core 3.1, you should download and install Runtime 3.1.18 or SDK 3.1.118 (for Visual Studio 2019 v16.4) or 3.1.412 (for Visual Studio 2019 v16.7 or later) from https://dotnet.microsoft.com/download/dotnet-core/3.1.

* If you're using .NET Core 2.1, you should download and install Runtime 2.1.29 or SDK 2.1.525 (for Visual Studio 2019 v15.9) or 2.1.817 from https://dotnet.microsoft.com/download/dotnet-core/2.1.


#### Other Details

- Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/196
- An Issue for this can be found at https://github.com/dotnet/runtime/issues/57174
- MSRC details for this can be found at https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-34485
references
0
reference_url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-34485.json
reference_id
reference_type
scores
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url https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-34485.json
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published_at 2026-04-09T12:55:00Z
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scoring_elements 0.76513
published_at 2026-04-02T12:55:00Z
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scoring_system epss
scoring_elements 0.76508
published_at 2026-04-01T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2021-34485
2
reference_url https://github.com/dotnet/announcements/issues/196
reference_id
reference_type
scores
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value 5.5
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://github.com/dotnet/announcements/issues/196
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reference_url https://github.com/dotnet/runtime/security/advisories/GHSA-vgwq-hfqc-58wv
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reference_type
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1
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scoring_system cvssv3.1_qr
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scoring_system generic_textual
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reference_url https://github.com/github/advisory-database/issues/741
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fixed_packages
0
url pkg:nuget/Microsoft.NETCore.App.Runtime.rhel.6-x64@3.1.18
purl pkg:nuget/Microsoft.NETCore.App.Runtime.rhel.6-x64@3.1.18
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:nuget/Microsoft.NETCore.App.Runtime.rhel.6-x64@3.1.18
aliases CVE-2021-34485, GHSA-vgwq-hfqc-58wv
risk_score 3.1
exploitability 0.5
weighted_severity 6.2
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-du1r-hgyq-z7c7
Fixing_vulnerabilities
Risk_score4.0
Resource_urlhttp://public2.vulnerablecode.io/packages/pkg:nuget/Microsoft.NETCore.App.Runtime.rhel.6-x64@3.1.16