How severe is GHSA-485p-mrj5-8w2v?

GHSA-485p-mrj5-8w2v has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by GHSA-485p-mrj5-8w2v?

GHSA-485p-mrj5-8w2v affects the following packages: Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet), Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet), Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet), Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet), Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet), Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet), Microsoft.AspNetCore.App.Runtime.win-arm (NuGet), Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet), and 25 more. Ecosystems affected: NuGet.

How do I fix GHSA-485p-mrj5-8w2v?

Update Microsoft.AspNetCore.App.Runtime.linux-arm to 3.1.25 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-485p-mrj5-8w2v is resolved across your whole dependency graph.

How do I detect GHSA-485p-mrj5-8w2v in my NuGet dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.AspNetCore.App.Runtime.linux-arm, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-485p-mrj5-8w2v if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is GHSA-485p-mrj5-8w2v actively exploited in the wild?

No public exploit code has been indexed for GHSA-485p-mrj5-8w2v yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-485p-mrj5-8w2v?

GHSA-485p-mrj5-8w2v has an EPSS (Exploit Prediction Scoring System) score of 5.7%, placing it in the 93th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

When was GHSA-485p-mrj5-8w2v published, and has it been updated?

GHSA-485p-mrj5-8w2v was published on October 21, 2022 and was last updated on September 4, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

.NET

.NET NuGet

Not in CISA KEV

HIGH severity

.NET Denial of Service VulnerabilityGHSA-485p-mrj5-8w2v

HIGH

GHSA-485p-mrj5-8w2v is a high-severity (CVSS 7.5) vulnerability in Microsoft.AspNetCore.App.Runtime.linux-arm. A fix is available for Microsoft.AspNetCore.App.Runtime.linux-arm — see the affected versions and patch details below.

Also known asBIT-dotnet-2022-23267BIT-dotnet-sdk-2022-23267BIT-powershell-2022-23267CVE-2022-23267

Published

Oct 21, 2022

Updated

Sep 4, 2025

Affected

33 pkgs

Patched

33 / 33

Exploits

None indexed

Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-485p-mrj5-8w2v.

EPSS Exploitation Probability

via FIRST.org ↗

5.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs93th percentile — riskier than 93% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

33 pkgs affected

.NETMicrosoft.AspNetCore.App.Runtime.linux-arm.NETMicrosoft.AspNetCore.App.Runtime.linux-arm64.NETMicrosoft.AspNetCore.App.Runtime.linux-musl-arm64.NETMicrosoft.AspNetCore.App.Runtime.linux-musl-x64.NETMicrosoft.AspNetCore.App.Runtime.linux-x64.NETMicrosoft.AspNetCore.App.Runtime.osx-x64.NETMicrosoft.AspNetCore.App.Runtime.win-arm.NETMicrosoft.AspNetCore.App.Runtime.win-arm64+25 more

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

A vulnerability exists in .NET 6.0, .NET 5.0 and .NET Core 3.1 where a malicious client can cause a Denial of Service via excess memory allocations through HttpClient.

Affected software

Any .NET 6.0 application running on .NET 6.0.4 or earlier.
Any .NET 5.0 application running .NET 5.0.16 or earlier.
Any .NET Core 3.1 applicaiton running on .NET Core 3.1.24 or earlier.

Patches

If you're using .NET Core 6.0, you should download and install Runtime 6.0.5 or SDK 6.0.105 (for Visual Studio 2022 v17.0) or SDK 6.0.203 (for Visual Studio 2022 v17.1) from https://dotnet.microsoft.com/download/dotnet-core/6.0.
If you're using .NET 5.0, you should download and install Runtime 5.0.17 or SDK 5.0.214 (for Visual Studio 2019 v16.9) or SDK 5.0.408 (for Visual Studio 2011 v16.11) from https://dotnet.microsoft.com/download/dotnet-core/5.0.
If you're using .NET Core 3.1, you should download and install Runtime 3.1.25 or SDK 3.1.419 (for Visual Studio 2019 v16.9 or Visual Studio 2011 16.11 or Visual Studio 2022 17.0 or Visual Studio 2022 17.1 ) from https://dotnet.microsoft.com/download/dotnet-core/3.1.

.NET 6.0, .NET 5.0 and .NET Core 3.1 updates are also available from Microsoft Update. To access this either type "Check for updates" in your Windows search, or open Settings, choose Update & Security and then click Check for Updates.

Other Details

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/221 An Issue for this can be found at https://github.com/dotnet/runtime/issues/69149 MSRC details for this can be found at https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2022-23267

Affected Packages

33 total 33 fixed

Ecosystem	Package	Vulnerable range	Fix
.NETNuGet	`Microsoft.AspNetCore.App.Runtime.linux-arm`	≥ 3.0.0&&< 3.1.25	3.1.25`dotnet add package Microsoft.AspNetCore.App.Runtime.linux-arm --version 3.1.25`
.NETNuGet	`Microsoft.AspNetCore.App.Runtime.linux-arm64`	≥ 3.0.0&&< 3.1.25	3.1.25`dotnet add package Microsoft.AspNetCore.App.Runtime.linux-arm64 --version 3.1.25`
.NETNuGet	`Microsoft.AspNetCore.App.Runtime.linux-musl-arm64`	≥ 3.0.0&&< 3.1.25	3.1.25`dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 --version 3.1.25`
.NETNuGet	`Microsoft.AspNetCore.App.Runtime.linux-musl-x64`	≥ 3.0.0&&< 3.1.25	3.1.25`dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-x64 --version 3.1.25`
.NETNuGet	`Microsoft.AspNetCore.App.Runtime.linux-x64`	≥ 3.0.0&&< 3.1.25	3.1.25`dotnet add package Microsoft.AspNetCore.App.Runtime.linux-x64 --version 3.1.25`
.NETNuGet	`Microsoft.AspNetCore.App.Runtime.osx-x64`	≥ 3.0.0&&< 3.1.25	3.1.25`dotnet add package Microsoft.AspNetCore.App.Runtime.osx-x64 --version 3.1.25`

Affected Products

6 products · 12 configurations

fedorafedoraproject

3 versions

343536

Application

.netmicrosoft

2 versions

5.06.0.0

Application

.net coremicrosoft

1 version

3.1

Application

powershellmicrosoft

≥ 7.2 && < 7.2.4

range

Application

visual studio 2019microsoft

≥ 16.10 && < 16.11.14

range

Application

visual studio 2022microsoft

2 versions

17.017.1

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.AspNetCore.App.Runtime.linux-arm, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update Microsoft.AspNetCore.App.Runtime.linux-arm to 3.1.25 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-485p-mrj5-8w2v is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatImportant

Affected .NET versions: 6.0, 5.0, 3.1

Product	Fixed in	Advisory
.NET Core on Red Hat Enterprise Linux	`rh-dotnet31-dotnet-0:3.1.419-1.el7_9`	RHSA-2022:2194
.NET Core on Red Hat Enterprise Linux	`rh-dotnet50-dotnet-0:5.0.214-1.el7_9`	RHSA-2022:2196
.NET Core on Red Hat Enterprise Linux	`rh-dotnet60-dotnet-0:6.0.105-1.el7_9`	RHSA-2022:2195
Red Hat Enterprise Linux 8	`dotnet6.0-0:6.0.105-1.el8_6`	RHSA-2022:2199
Red Hat Enterprise Linux 8	`dotnet5.0-0:5.0.214-1.el8_6`	RHSA-2022:2200
Red Hat Enterprise Linux 8	`dotnet3.1-0:3.1.419-1.el8_6`	RHSA-2022:2202
Red Hat Enterprise Linux 9	`dotnet6.0-0:6.0.105-1.el9_0`	RHSA-2022:4588

Frequently Asked Questions

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 6.0, .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 vulnerability exists in .NET 6.0, .NET 5.0 and .NET Core 3.1 where a malicious client can cause a Denial of Service via excess memory allocations through HttpClient. ### Affected software * Any .NET 6.0 application running on .NET 6.0.4 or earlier. * Any .NET 5.0 application running .NET 5.0.16 or earlier. * Any .NET Core 3.1 applicaiton r

O3 Security · Impact-Aware SCA

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CVSS Score

7.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

runtime

5.1/10

Code-Review10/10

Maintained10/10

Branch-Protection8/10

Assessed Nov 2, 2026

Timeline

Disclosed

Oct 21, 2022

Last updated

Sep 4, 2025

Identifiers

GHSA-485p-mrj5-8w2v

BIT-dotnet-2022-23267

BIT-dotnet-sdk-2022-23267

BIT-powershell-2022-23267

References

Advisorynvd.nist.gov · CVE 2022 23267 Webgithub.com · GHSA 485p mrj5 8w2v Webgithub.com Weblists.fedoraproject.org · GNXQL7EZORGU4PZCPJ5EPQ4P7IEY3ZZO Weblists.fedoraproject.org · IBYSBUDJYQ76HK4TULXVIIPCKK2U6WDB Weblists.fedoraproject.org · W5FPEQ6BTYRGTS6IYCDTZW6YF5HLQ3BY Weblists.fedoraproject.org · GNXQL7EZORGU4PZCPJ5EPQ4P7IEY3ZZO Weblists.fedoraproject.org · IBYSBUDJYQ76HK4TULXVIIPCKK2U6WDB Weblists.fedoraproject.org · W5FPEQ6BTYRGTS6IYCDTZW6YF5HLQ3BY Webmsrc.microsoft.com · CVE 2022 23267

Related vulnerabilities

This CVE is high severity; 3 of 8 other CVEs affecting Microsoft.AspNetCore.App.Runtime.linux-arm are rated as high or higher (top: high).

CVE-2026-118748CVE-2026-114146CVE-2026-114150CVE-2026-114156CVE-2026-109478CVE-2026-114147CVE-2026-118749CVE-2026-114149

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedSep 4, 2025

.NET Denial of Service VulnerabilityGHSA-485p-mrj5-8w2v

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected software

Patches

Other Details

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is GHSA-485p-mrj5-8w2v in your dependencies?