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TI-2026-31103 Aliases CVE-2026-42899GHSA-9v76-4qcc-frgh

ASP.NET Core Denial of Service Vulnerability

Priority MEDIUM 43CWE-835Published · 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

Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0243 84th percentileScored 2026-11-07
Fix Fixed Microsoft.AspNetCore.App.Runtime.win-arm (NuGet): 8.0.27, 9.0.16, 10.0.8Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): 8.0.27, 9.0.16, 10.0.8+10 more productsRed Hat: 17 advisoriesMicrosoft: 3 updates

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 10.010.0.0 to before 10.0.810.0.8Patch availableCNA
Microsoft.NET 8.08.0.0 to before 8.0.278.0.27Patch availableCNA
Microsoft.NET 9.09.0.0 to before 9.0.169.0.16Patch availableCNA
—Microsoft.AspNetCore.App.Runtime.win-arm (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet)8.0.0 to before 8.0.278.0.27Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-arm (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-arm (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet)9.0.0 to before 9.0.169.0.16Patch availableGHSA-9v76-4qcc-frgh
—Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet)10.0.0 to before 10.0.810.0.8Patch availableGHSA-9v76-4qcc-frgh
  • .NET 10.0 VendorMicrosoft Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available CNA
  • .NET 8.0 VendorMicrosoft Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available CNA
  • .NET 9.0 VendorMicrosoft Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available CNA
  • Microsoft.AspNetCore.App.Runtime.win-arm (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet) Vendor— Affected 8.0.0 to before 8.0.27 Fixed in 8.0.27 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-arm (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-arm (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet) Vendor— Affected 9.0.0 to before 9.0.16 Fixed in 9.0.16 Patch available GHSA-9v76-4qcc-frgh
  • Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet) Vendor— Affected 10.0.0 to before 10.0.8 Fixed in 10.0.8 Patch available GHSA-9v76-4qcc-frgh

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*8.0.0 to before 8.0.27; 9.0.0 to before 9.0.16; 10.0.0 to before 10.0.8VulnerableMicrosoft
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*not specified by NVDRunning onApple
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*not specified by NVDRunning onLinux
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.0.27; 9.0.0 to before 9.0.16; 10.0.0 to before 10.0.8 Vulnerable ·Microsoft
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
  • cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-arm (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet) Fixed in 8.0.27 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-arm (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-arm (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet) Fixed in 10.0.8 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet) Fixed in 9.0.16 Advisory →
  • Fix · GHSA-9v76-4qcc-frgh Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet) Fixed in 10.0.8 Advisory →

Red Hat 17 advisories

  • RHSA-2026:24335 Released 2026-06-08 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) dotnet-sdk-8.0-source-built-artifacts-8.0.127-1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) aspnetcore-runtime-8.0-8.0.27-1.el9_6, aspnetcore-runtime-dbg-8.0-8.0.27-1.el9_6, aspnetcore-targeting-pack-8.0-8.0.27-1.el9_6 +9
  • RHSA-2026:24336 Released 2026-06-08 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) dotnet-sdk-9.0-source-built-artifacts-9.0.117-1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) aspnetcore-runtime-9.0-9.0.16-1.el9_6, aspnetcore-runtime-dbg-9.0-9.0.16-1.el9_6, aspnetcore-targeting-pack-9.0-9.0.16-1.el9_6 +12
  • RHSA-2026:24334 Released 2026-06-08 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) aspnetcore-runtime-8.0-8.0.27-1.el9_4, aspnetcore-runtime-dbg-8.0-8.0.27-1.el9_4, aspnetcore-targeting-pack-8.0-8.0.27-1.el9_4 +11
Show 14 more Red Hat advisories
  • RHSA-2026:24333 Released 2026-06-08 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) aspnetcore-runtime-9.0-9.0.16-1.el10_0, aspnetcore-runtime-dbg-9.0-9.0.16-1.el10_0, aspnetcore-targeting-pack-9.0-9.0.16-1.el10_0 +12
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dotnet-sdk-9.0-source-built-artifacts-9.0.117-1.el10_0
  • RHSA-2026:24332 Released 2026-06-08 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) aspnetcore-runtime-8.0-8.0.27-1.el10_0, aspnetcore-runtime-dbg-8.0-8.0.27-1.el10_0, aspnetcore-targeting-pack-8.0-8.0.27-1.el10_0 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) dotnet-sdk-8.0-source-built-artifacts-8.0.127-1.el10_0
  • RHSA-2026:22145 Released 2026-06-01 · Red Hat rating Important
    .NET 10.0 security update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-10.0-10.0.8-1.el10_2, aspnetcore-runtime-dbg-10.0-10.0.8-1.el10_2, aspnetcore-targeting-pack-10.0-10.0.8-1.el10_2 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-10.0-source-built-artifacts-10.0.108-1.el10_2
  • RHSA-2026:21754 Released 2026-05-28 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-9.0-9.0.16-1.el10_2, aspnetcore-runtime-dbg-9.0-9.0.16-1.el10_2, aspnetcore-targeting-pack-9.0-9.0.16-1.el10_2 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-9.0-source-built-artifacts-9.0.117-1.el10_2
  • RHSA-2026:21296 Released 2026-05-27 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-9.0-9.0.16-1.el9_8, aspnetcore-runtime-dbg-9.0-9.0.16-1.el9_8, aspnetcore-targeting-pack-9.0-9.0.16-1.el9_8 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-9.0-source-built-artifacts-9.0.117-1.el9_8
  • RHSA-2026:21297 Released 2026-05-27 · Red Hat rating Important
    .NET 10.0 security update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-10.0-10.0.8-1.el9_8, aspnetcore-runtime-dbg-10.0-10.0.8-1.el9_8, aspnetcore-targeting-pack-10.0-10.0.8-1.el9_8 +11
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-10.0-source-built-artifacts-10.0.108-1.el9_8
  • RHSA-2026:21294 Released 2026-05-27 · Red Hat rating Important
    .NET 9.0 security update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-9.0-9.0.16-1.el8_10, aspnetcore-runtime-dbg-9.0-9.0.16-1.el8_10, aspnetcore-targeting-pack-9.0-9.0.16-1.el8_10 +11
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-9.0-source-built-artifacts-9.0.117-1.el8_10
  • RHSA-2026:21295 Released 2026-05-27 · Red Hat rating Important
    .NET 10.0 security update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-10.0-10.0.8-1.el8_10, aspnetcore-runtime-dbg-10.0-10.0.8-1.el8_10, aspnetcore-targeting-pack-10.0-10.0.8-1.el8_10 +12
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-10.0-source-built-artifacts-10.0.108-1.el8_10
  • RHSA-2026:21293 Released 2026-05-27 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream (v. 9) aspnetcore-runtime-8.0-8.0.27-1.el9_8, aspnetcore-runtime-dbg-8.0-8.0.27-1.el9_8, aspnetcore-targeting-pack-8.0-8.0.27-1.el9_8 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) dotnet-sdk-8.0-source-built-artifacts-8.0.127-1.el9_8
  • RHSA-2026:21291 Released 2026-05-27 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-8.0-8.0.27-1.el8_10, aspnetcore-runtime-dbg-8.0-8.0.27-1.el8_10, aspnetcore-targeting-pack-8.0-8.0.27-1.el8_10 +9
    • Red Hat Enterprise Linux CRB (v. 8) dotnet-sdk-8.0-source-built-artifacts-8.0.127-1.el8_10
  • RHSA-2026:21286 Released 2026-05-27 · Red Hat rating Important
    .NET 8.0 security update
    • Red Hat Enterprise Linux AppStream (v. 10) aspnetcore-runtime-8.0-8.0.27-1.el10_2, aspnetcore-runtime-dbg-8.0-8.0.27-1.el10_2, aspnetcore-targeting-pack-8.0-8.0.27-1.el10_2 +9
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) dotnet-sdk-8.0-source-built-artifacts-8.0.127-1.el10_2
  • RHSA-2026:17682 Released 2026-05-14 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images dotnet8.0-8.0.127-1.hum1@src
  • RHSA-2026:17527 Released 2026-05-14 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images dotnet9.0-9.0.117-1.hum1@src
  • RHSA-2026:17464 Released 2026-05-14 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images dotnet10.0-10.0.108-1.hum1@src

Microsoft 3 updates

  • KB5093448
    Security Update
    • .NET 9.0 installed on Linux 9.0.16
    • .NET 9.0 installed on Mac OS 9.0.16
    • .NET 9.0 installed on Windows 9.0.16
  • KB5093447
    Security Update
    • .NET 8.0 installed on Linux 8.0.27
    • .NET 8.0 installed on Mac OS 8.0.27
    • .NET 8.0 installed on Windows 8.0.27
  • KB5093446
    Security Update
    • .NET 10.0 installed on Linux 10.0.8
    • .NET 10.0 installed on Mac OS 10.0.8
    • .NET 10.0 installed on Windows 10.0.8

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:24335, RHSA-2026:24336
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:21286, RHSA-2026:21754, RHSA-2026:22145
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:21291, RHSA-2026:21294, RHSA-2026:21295
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:21293, RHSA-2026:21296, RHSA-2026:21297
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:24334
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:24332, RHSA-2026:24333
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:24335, RHSA-2026:24336
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:21291, RHSA-2026:21294, RHSA-2026:21295
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:21286, RHSA-2026:21754, RHSA-2026:22145
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:21293, RHSA-2026:21296, RHSA-2026:21297
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:24332, RHSA-2026:24333
Red Hat Hardened ImagesFixed RHSA-2026:17464, RHSA-2026:17527, RHSA-2026:17682
Not affected: 1 product
  • Red Hat Hardened Images

Microsoft

Microsoft's page for this CVE →

Impact
Denial of Service
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Unlikely

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42899
  2. 2026-10-03 Alias added: GHSA-9v76-4qcc-frgh

References

Patch 1

Advisory 1

Other 3

  • 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