Read the docs
TI-2023-07935 Aliases CVE-2023-21538GHSA-8f7f-vqg5-jrv9

.NET Denial of Service Vulnerability

Priority MEDIUM 44CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub, Red Hat and Microsoft. Impact type from Microsoft.

Summary

.NET Denial of Service Vulnerability

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02838 86th percentileScored 2026-11-07
Fix Fixed Microsoft.NETCore.App.Runtime.linux-arm (NuGet): 6.0.13Microsoft.NETCore.App.Runtime.linux-arm64 (NuGet): 6.0.13+10 more productsRed Hat: 3 advisoriesMicrosoft: 1 update

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Microsoft.NET 6.06.0.0 to before 6.0.136.0.13Patch availableCNA
MicrosoftPowerShell 7.27.2.0 to before 7.2.97.2.9Patch availableCNA
—Microsoft.NETCore.App.Runtime.linux-arm (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.linux-arm64 (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.linux-musl-arm (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.linux-musl-arm64 (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.linux-musl-x64 (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.linux-x64 (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.osx-x64 (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.win-arm (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.win-arm64 (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.win-x64 (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
—Microsoft.NETCore.App.Runtime.win-x86 (NuGet)6.0.0 to before 6.0.136.0.13Patch availableGHSA-8f7f-vqg5-jrv9
  • .NET 6.0 VendorMicrosoft Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available CNA
  • PowerShell 7.2 VendorMicrosoft Affected 7.2.0 to before 7.2.9 Fixed in 7.2.9 Patch available CNA
  • Microsoft.NETCore.App.Runtime.linux-arm (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.linux-arm64 (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.linux-musl-arm (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.linux-musl-arm64 (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.linux-musl-x64 (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.linux-x64 (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.osx-x64 (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.win-arm (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.win-arm64 (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.win-x64 (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9
  • Microsoft.NETCore.App.Runtime.win-x86 (NuGet) Vendor— Affected 6.0.0 to before 6.0.13 Fixed in 6.0.13 Patch available GHSA-8f7f-vqg5-jrv9

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:.net:6.0.0:-:*:*:*:*:*:*6.0.0VulnerableMicrosoft
cpe:2.3:a:microsoft:powershell:7.2:*:*:*:*:*:*:*7.2VulnerableMicrosoft
cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*36VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*37VulnerableFedoraproject
  • cpe:2.3:a:microsoft:.net:6.0.0:-:*:*:*:*:*:* Versions 6.0.0 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:powershell:7.2:*:*:*:*:*:*:* Versions 7.2 Vulnerable ·Microsoft
  • cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject

Remediation

  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.linux-arm (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.linux-arm64 (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.linux-musl-arm (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.linux-musl-arm64 (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.linux-musl-x64 (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.linux-x64 (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.osx-arm64 (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.osx-x64 (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.win-arm (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.win-arm64 (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.win-x64 (NuGet) Fixed in 6.0.13 Advisory →
  • Fix · GHSA-8f7f-vqg5-jrv9 Microsoft.NETCore.App.Runtime.win-x86 (NuGet) Fixed in 6.0.13 Advisory →

Red Hat 3 advisories

  • RHSA-2023:0079 Released 2023-01-11 · Red Hat rating Moderate
    .NET 6.0 security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) dotnet-sdk-6.0-source-built-artifacts-6.0.113-1.el8_7
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-6.0-6.0.13-1.el8_7, aspnetcore-targeting-pack-6.0-6.0.13-1.el8_7, dotnet-apphost-pack-6.0-6.0.13-1.el8_7 +6
  • RHSA-2023:0078 Released 2023-01-11 · Red Hat rating Moderate
    .NET 6.0 security, bug fix, and enhancement update
    • .NET Core on Red Hat Enterprise Linux ComputeNode (v. 7) rh-dotnet60-aspnetcore-runtime-6.0-6.0.13-1.el7_9, rh-dotnet60-aspnetcore-targeting-pack-6.0-6.0.13-1.el7_9, rh-dotnet60-dotnet-6.0.113-1.el7_9 +9
    • .NET Core on Red Hat Enterprise Linux Server (v. 7) rh-dotnet60-aspnetcore-runtime-6.0-6.0.13-1.el7_9, rh-dotnet60-aspnetcore-targeting-pack-6.0-6.0.13-1.el7_9, rh-dotnet60-dotnet-6.0.113-1.el7_9 +9
    • .NET Core on Red Hat Enterprise Linux Workstation (v. 7) rh-dotnet60-aspnetcore-runtime-6.0-6.0.13-1.el7_9, rh-dotnet60-aspnetcore-targeting-pack-6.0-6.0.13-1.el7_9, rh-dotnet60-dotnet-6.0.113-1.el7_9 +9
  • RHSA-2023:0077 Released 2023-01-11 · Red Hat rating Moderate
    .NET 6.0 security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 9) dotnet-sdk-6.0-source-built-artifacts-6.0.113-1.el9_1
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-6.0-6.0.13-1.el9_1, aspnetcore-targeting-pack-6.0-6.0.13-1.el9_1, dotnet-apphost-pack-6.0-6.0.13-1.el9_1 +6

Microsoft 1 update

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
.NET Core on Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2023:0078
.NET Core on Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2023:0078
.NET Core on Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2023:0078
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2023:0079
Red Hat CodeReady Linux Builder (v. 9)Fixed RHSA-2023:0077
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:0079
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:0077
Not affected: 4 products
  • .NET Core 3.1 on Red Hat Enterprise Linux
  • .NET Core 5.0 on Red Hat Enterprise Linux
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Microsoft

Microsoft's page for this CVE →

Impact
Denial of Service
Exploited
No
Publicly disclosed
—
Exploitability
—
ProductStatusPlan or fix
PowerShell 7.2Fixed 7.2.9 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-21538
  2. 2026-10-03 Alias added: GHSA-8f7f-vqg5-jrv9

References

Advisory 2

Other 5

  • TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-19596 .NET and Visual Studio Denial of Service Vulnerability KEVCVSS 3.1HIGH 7.5
  • TI-2023-19588 Microsoft QUIC Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2024-14152 .NET and Visual Studio Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2021-08380 .NET Core Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
See all 129 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences