CVE-2026-26127
High
Description
Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Microsoft .net
PublishedMar 10, 2026
First seenMar 10, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- microsoft .net10.0.4, 9.0.14 or later
- microsoft bcl.memory9.0.14, 10.0.4 or later
- Microsoft.Bcl.Memory9.0.14, 10.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-arm9.0.14, 10.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-arm649.0.14, 10.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-musl-arm9.0.14, 10.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-musl-arm649.0.14, 10.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-musl-x649.0.14, 10.0.4 or later
- Microsoft.NetCore.App.Runtime.linux-x649.0.14, 10.0.4 or later
- Microsoft.NetCore.App.Runtime.osx-arm649.0.14, 10.0.4 or later
- Microsoft.NetCore.App.Runtime.osx-x649.0.14, 10.0.4 or later
- Microsoft.NetCore.App.Runtime.win-arm9.0.14, 10.0.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft .net | 10.0.0 ≤ v < 10.0.4, 9.0.0 ≤ v < 9.0.14 | 10.0.4, 9.0.14 |
| microsoft bcl.memory | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.Bcl.MemoryNuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-armNuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-arm64NuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-musl-armNuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-musl-arm64NuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-musl-x64NuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.linux-x64NuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.osx-arm64NuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.osx-x64NuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.win-armNuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.win-arm64NuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.win-x64NuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
| Microsoft.NetCore.App.Runtime.win-x86NuGet | 9.0.0 ≤ v < 9.0.14, 10.0.0 ≤ v < 10.0.4 | 9.0.14, 10.0.4 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.