CVE-2026-42899
High
Description
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Microsoft .net
PublishedMay 12, 2026
First seenMay 12, 2026
Weakness typeCWE-835CWE-835
How to fix
Update
- microsoft .net8.0.27, 9.0.16, 10.0.8 or later
- Microsoft.AspNetCore.App.Runtime.win-arm8.0.27, 9.0.16, 10.0.8 or later
- Microsoft.AspNetCore.App.Runtime.win-arm648.0.27, 9.0.16, 10.0.8 or later
- Microsoft.AspNetCore.App.Runtime.win-x648.0.27, 9.0.16, 10.0.8 or later
- Microsoft.AspNetCore.App.Runtime.win-x868.0.27, 9.0.16, 10.0.8 or later
- Microsoft.AspNetCore.App.Runtime.linux-arm8.0.27, 9.0.16, 10.0.8 or later
- Microsoft.AspNetCore.App.Runtime.linux-arm648.0.27, 9.0.16, 10.0.8 or later
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm8.0.27, 9.0.16, 10.0.8 or later
- Microsoft.AspNetCore.App.Runtime.linux-musl-arm648.0.27, 9.0.16, 10.0.8 or later
- Microsoft.AspNetCore.App.Runtime.linux-musl-x648.0.27, 10.0.8, 9.0.16 or later
- Microsoft.AspNetCore.App.Runtime.linux-x648.0.27, 9.0.16, 10.0.8 or later
- Microsoft.AspNetCore.App.Runtime.osx-arm648.0.27, 9.0.16, 10.0.8 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:24332
- access.redhat.com/errata/RHSA-2026:24333
- access.redhat.com/errata/RHSA-2026:22145
- access.redhat.com/errata/RHSA-2026:21286
- access.redhat.com/errata/RHSA-2026:21754
- access.redhat.com/errata/RHSA-2026:21295
- access.redhat.com/errata/RHSA-2026:21291
- access.redhat.com/errata/RHSA-2026:21294
- access.redhat.com/errata/RHSA-2026:24334
- access.redhat.com/errata/RHSA-2026:24335
- access.redhat.com/errata/RHSA-2026:24336
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft .net | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.win-armNuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.win-arm64NuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.win-x64NuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.win-x86NuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.linux-armNuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.linux-arm64NuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-armNuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-arm64NuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.linux-musl-x64NuGet | 8.0.0 ≤ v < 8.0.27, 10.0.0 ≤ v < 10.0.8, 9.0.0 ≤ v < 9.0.16 | 8.0.27, 10.0.8, 9.0.16 |
| Microsoft.AspNetCore.App.Runtime.linux-x64NuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.osx-arm64NuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
| Microsoft.AspNetCore.App.Runtime.osx-x64NuGet | 8.0.0 ≤ v < 8.0.27, 9.0.0 ≤ v < 9.0.16, 10.0.0 ≤ v < 10.0.8 | 8.0.27, 9.0.16, 10.0.8 |
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