Description
Stack-based buffer overflow in .NET allows an unauthorized attacker to deny service over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | .NET 10.0 installed on Linux | 10.0.0 – < 10.0.15 | 10.0.15 |
| Microsoft | .NET 10.0 installed on Mac OS | 10.0.0 – < 10.0.15 | 10.0.15 |
| Microsoft | .NET 11.0 installed on Linux | 11.0.0-preview.1 – < 11.0.0 | 11.0.0 |
| Microsoft | .NET 11.0 installed on Mac OS | 11.0.0-preview.1 – < 11.0.0 | 11.0.0 |
| Microsoft | .NET 8.0 installed on Linux | 8.0.0 – < 8.0.34 | 8.0.34 |
| Microsoft | .NET 8.0 installed on Mac OS | 8.0.0 – < 8.0.34 | 8.0.34 |
| Microsoft | .NET 9.0 installed on Linux | 9.0.0 – < 9.0.23 | 9.0.23 |
| Microsoft | .NET 9.0 installed on Mac OS | 9.0.0 – < 9.0.23 | 9.0.23 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | dotnet10 | 10.0.115-10.0.15-0ubuntu1~26.10.1 | USN-9042-1 |
| Ubuntu 26.10 | dotnet11 | 11.0.100-11.0.0-0ubuntu1~26.10.1 | USN-9042-1 |
| Ubuntu 26.04 LTS | dotnet10 | 10.0.115-10.0.15-0ubuntu1~26.04.1 | USN-9042-1 |
| Ubuntu 24.04 LTS | dotnet10 | 10.0.115-10.0.15-0ubuntu1~24.04.1 | USN-9042-1 |
| Ubuntu 24.04 LTS | dotnet8 | 8.0.134-8.0.34-0ubuntu1~24.04.1 | USN-9042-1 |
| Ubuntu 22.04 LTS | dotnet6 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | dotnet8 | 8.0.134-8.0.34-0ubuntu1~22.04.1 | USN-9042-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | dotnet-hostfxr-10.0 +7 | 10.0.15-1.el10_3 | RHSA-2026:99143 |
| RHEL 10 | dotnet-hostfxr-8.0 +7 | 8.0.34-1.el10_3 | RHSA-2026:99147 |
| RHEL 10 | dotnet-hostfxr-9.0 +7 | 9.0.23-1.el10_3 | RHSA-2026:99145 |
| RHEL 10 | dotnet10.0 +5 | 10.0.115-1.el10_3 | RHSA-2026:99143 |
| RHEL 10 | dotnet8.0 +4 | 8.0.134-1.el10_3 | RHSA-2026:99147 |
| RHEL 10 | dotnet9.0 +6 | 9.0.124-1.el10_3 | RHSA-2026:99145 |
| RHEL 9 | dotnet-hostfxr-10.0 +7 | 10.0.15-1.el9_9 | RHSA-2026:99142 |
| RHEL 9 | dotnet-hostfxr-8.0 +7 | 8.0.34-1.el9_9 | RHSA-2026:99146 |
| RHEL 9 | dotnet-hostfxr-9.0 +7 | 9.0.23-1.el9_9 | RHSA-2026:99144 |
| RHEL 9 | dotnet10.0 +5 | 10.0.115-1.el9_9 | RHSA-2026:99142 |
| RHEL 9 | dotnet8.0 +4 | 8.0.134-1.el9_9 | RHSA-2026:99146 |
| RHEL 9 | dotnet9.0 +6 | 9.0.124-1.el9_9 | RHSA-2026:99144 |
| RHEL 8 | dotnet-hostfxr-10.0 +7 | 10.0.15-1.el8_10 | RHSA-2026:99053 |
| RHEL 8 | dotnet-hostfxr-8.0 +7 | 8.0.34-1.el8_10 | RHSA-2026:99052 |
| RHEL 8 | dotnet-hostfxr-9.0 +7 | 9.0.23-1.el8_10 | RHSA-2026:99051 |
| RHEL 8 | dotnet10.0 +5 | 10.0.115-1.el8_10 | RHSA-2026:99053 |
| RHEL 8 | dotnet8.0 +4 | 8.0.134-1.el8_10 | RHSA-2026:99052 |
| RHEL 8 | dotnet9.0 +6 | 9.0.124-1.el8_10 | RHSA-2026:99051 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | dotnet-hostfxr-10.0 +7 | 10.0.15-1.el8_10 | ALSA-2026:99053 |
| AlmaLinux 8 | dotnet-hostfxr-8.0 +7 | 8.0.34-1.el8_10 | ALSA-2026:99052 |
| AlmaLinux 8 | dotnet-hostfxr-9.0 +7 | 9.0.23-1.el8_10 | ALSA-2026:99051 |
| AlmaLinux 8 | dotnet-sdk-10.0 +4 | 10.0.115-1.el8_10 | ALSA-2026:99053 |
| AlmaLinux 8 | dotnet-sdk-8.0 +3 | 8.0.134-1.el8_10 | ALSA-2026:99052 |
| AlmaLinux 8 | dotnet-sdk-9.0 +5 | 9.0.124-1.el8_10 | ALSA-2026:99051 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | dotnet-hostfxr-10.0 +7 | 10.0.15-1.el8_10 | RLSA-2026:99053 |
| Rocky Linux 8 | dotnet-hostfxr-8.0 +7 | 8.0.34-1.el8_10 | RLSA-2026:99052 |
| Rocky Linux 8 | dotnet-hostfxr-9.0 +7 | 9.0.23-1.el8_10 | RLSA-2026:99051 |
| Rocky Linux 8 | dotnet-sdk-10.0 +4 | 10.0.115-1.el8_10 | RLSA-2026:99053 |
| Rocky Linux 8 | dotnet-sdk-8.0 +3 | 8.0.134-1.el8_10 | RLSA-2026:99052 |
| Rocky Linux 8 | dotnet-sdk-9.0 +5 | 9.0.124-1.el8_10 | RLSA-2026:99051 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dotnet10-runtime | 10.0.15-r0 | — |
| Alpine v3.24 | dotnet8-runtime | 8.0.34-r0 | — |
| Alpine v3.24 | dotnet9-runtime | 9.0.23-r0 | — |
| Alpine v3.23 | dotnet8-runtime | 8.0.34-r0 | — |
| Alpine v3.23 | dotnet9-runtime | 9.0.23-r0 | — |
| Alpine v3.22 | dotnet8-runtime | 8.0.34-r0 | — |
| Alpine v3.22 | dotnet9-runtime | 9.0.23-r0 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | dotnet-bootstrap-8 +1 | No fix yet | — |
Affected packages
Advisories 19
- USN-9042-1 dotnet8, dotnet10, dotnet11 vulnerabilities Ubuntu Security Notices (USN) · Nov 13, 2026
- RHSA-2026:99143 Red Hat Security Advisory: .NET 10.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99053 Red Hat Security Advisory: .NET 10.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99051 Red Hat Security Advisory: .NET 9.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99142 Red Hat Security Advisory: .NET 10.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99146 Red Hat Security Advisory: .NET 8.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99147 Red Hat Security Advisory: .NET 8.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99145 Red Hat Security Advisory: .NET 9.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99144 Red Hat Security Advisory: .NET 9.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99052 Red Hat Security Advisory: .NET 8.0 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- ALSA-2026:99051 Important: .NET 9.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 13, 2026
- ALSA-2026:99053 Important: .NET 10.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 13, 2026
- ALSA-2026:99052 Important: .NET 8.0 security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 13, 2026
- RLSA-2026:99052 Important: .NET 8.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Nov 13, 2026
- RLSA-2026:99051 Important: .NET 9.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Nov 13, 2026
- RLSA-2026:99053 Important: .NET 10.0 security, bug fix, and enhancement update Rocky Linux Security Advisories · Nov 13, 2026
- WID-SEC-2026-4481 Microsoft Developer Tools: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- MSRC-CVE-2026-109475 .NET Denial of Service Vulnerability Microsoft Security Response Center · Nov 11, 2026
- NCSC-2026-0473 Kwetsbaarheden verholpen in Microsoft Developer Tools NCSC-NL (Netherlands) · Nov 10, 2026
References
- .NET Denial of Service Vulnerability vendor-advisory patch