Description
Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | .NET 8.0 | 8.0.0 – < 8.0.21 | 8.0.21 |
| Microsoft | .NET 9.0 | 9.0.0 – < 9.0.10 | 9.0.10 |
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 26.04 LTS | dotnet10 | 10.0.100-10.0.0~rc2-0ubuntu1 | — |
| Ubuntu 25.10 | dotnet10 | 10.0.100-10.0.0~rc2-0ubuntu1~25.10.2 | USN-7822-1 |
| Ubuntu 25.10 | dotnet8 | 8.0.121-8.0.21-0ubuntu1~25.10.1 | USN-7822-1 |
| Ubuntu 25.10 | dotnet9 | 9.0.111-9.0.10-0ubuntu1~25.10.1 | USN-7822-1 |
| Ubuntu 24.04 LTS | dotnet10 | 10.0.100-10.0.0-0ubuntu1~24.04.1 | — |
| Ubuntu 24.04 LTS | dotnet8 | 8.0.121-8.0.21-0ubuntu1~24.04.1 | USN-7822-1 |
| Ubuntu 22.04 LTS | dotnet6 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | dotnet8 | 8.0.121-8.0.21-0ubuntu1~22.04.1 | USN-7822-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | dotnet-host +8 | 9.0.10-1.el10_0 | RHSA-2025:18153, RHBA-2025:20993 |
| RHEL 10 | dotnet-hostfxr-10.0 +7 | 10.0.0~rc.2.25502.107-0.12.el10_1 | RHBA-2025:20993 |
| RHEL 10 | dotnet-hostfxr-8.0 +7 | 8.0.21-1.el10_0 | RHSA-2025:18152 |
| RHEL 10 | dotnet10.0 +5 | 10.0.100~rc.2.25502.107-0.12.el10_1 | RHBA-2025:20993 |
| RHEL 10 | dotnet8.0 +4 | 8.0.121-1.el10_0 | RHSA-2025:18152 |
| RHEL 10 | dotnet9.0 +6 | 9.0.111-1.el10_0 | RHSA-2025:18153 |
| RHEL 9 | dotnet-host +8 | 9.0.10-1.el9_6 | RHSA-2025:18151, RHBA-2025:20916 |
| RHEL 9 | dotnet-hostfxr-10.0 +7 | 10.0.0~rc.2.25502.107-0.10.el9_7 | RHBA-2025:20916 |
| RHEL 9 | dotnet-hostfxr-8.0 +7 | 8.0.21-1.el9_6 | RHSA-2025:18149 |
| RHEL 9 | dotnet10.0 +5 | 10.0.100~rc.2.25502.107-0.10.el9_7 | RHBA-2025:20916 |
| RHEL 9 | dotnet8.0 +4 | 8.0.121-1.el9_6 | RHSA-2025:18149 |
| RHEL 9 | dotnet9.0 +6 | 9.0.111-1.el9_6 | RHSA-2025:18151 |
| RHEL 8 | dotnet +7 | 9.0.111-1.el8_10 | RHSA-2025:18150 |
| RHEL 8 | dotnet-host +8 | 9.0.10-1.el8_10 | RHSA-2025:18150 |
| RHEL 8 | dotnet-hostfxr-8.0 +7 | 8.0.21-1.el8_10 | RHSA-2025:18148 |
| RHEL 8 | dotnet8.0 +4 | 8.0.121-1.el8_10 | RHSA-2025:18148 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | dotnet-host +8 | 8.0.21-1.el9_4 | RHSA-2025:18256 |
| RHEL 9.4 EUS | dotnet8.0 +5 | 8.0.121-1.el9_4 | RHSA-2025:18256 |
| Red Hat Hardened Images 1 | dotnet8.0 | 8.0.126-1.hum1 | RHSA-2026:9080 |
| Red Hat Hardened Images 1 | dotnet9.0 | 9.0.116-1.hum1 | RHSA-2026:9205 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | dotnet-host +8 | 9.0.10-1.el10_0 | ALSA-2025:18153 |
| AlmaLinux 10 | dotnet-hostfxr-8.0 +7 | 8.0.21-1.el10_0 | ALSA-2025:18152 |
| AlmaLinux 10 | dotnet-sdk-8.0 +3 | 8.0.121-1.el10_0 | ALSA-2025:18152 |
| AlmaLinux 10 | dotnet-sdk-9.0 +5 | 9.0.111-1.el10_0 | ALSA-2025:18153 |
| AlmaLinux 9 | dotnet-host +8 | 9.0.10-1.el9_6 | ALSA-2025:18151 |
| AlmaLinux 9 | dotnet-hostfxr-8.0 +7 | 8.0.21-1.el9_6 | ALSA-2025:18149 |
| AlmaLinux 9 | dotnet-sdk-8.0 +3 | 8.0.121-1.el9_6 | ALSA-2025:18149 |
| AlmaLinux 9 | dotnet-sdk-9.0 +5 | 9.0.111-1.el9_6 | ALSA-2025:18151 |
| AlmaLinux 8 | dotnet +6 | 9.0.111-1.el8_10 | ALSA-2025:18150 |
| AlmaLinux 8 | dotnet-host +8 | 9.0.10-1.el8_10 | ALSA-2025:18150 |
| AlmaLinux 8 | dotnet-hostfxr-8.0 +7 | 8.0.21-1.el8_10 | ALSA-2025:18148 |
| AlmaLinux 8 | dotnet-sdk-8.0 +3 | 8.0.121-1.el8_10 | ALSA-2025:18148 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | dotnet8.0 | 8.0.121-1.el10_0 | RLSA-2025:18152 |
| Rocky Linux 10 | dotnet9.0 | 9.0.111-1.el10_0 | RLSA-2025:18153 |
| Rocky Linux 9 | dotnet8.0 | 8.0.121-1.el9_6 | RLSA-2025:18149 |
| Rocky Linux 9 | dotnet9.0 | 9.0.111-1.el9_6 | RLSA-2025:18151 |
| Rocky Linux 8 | dotnet8.0 | 8.0.121-1.el8_10 | RLSA-2025:18148 |
| Rocky Linux 8 | dotnet9.0 | 9.0.111-1.el8_10 | RLSA-2025:18150 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dotnet8-runtime | 8.0.21-r0 | — |
| Alpine v3.24 | dotnet9-runtime | 9.0.10-r0 | — |
| Alpine v3.23 | dotnet8-runtime | 8.0.21-r0 | — |
| Alpine v3.23 | dotnet9-runtime | 9.0.10-r0 | — |
| Alpine v3.22 | dotnet8-runtime | 8.0.21-r0 | — |
| Alpine v3.22 | dotnet9-runtime | 9.0.10-r0 | — |
| Alpine v3.21 | dotnet8-runtime | 8.0.21-r0 | — |
| Alpine v3.21 | dotnet9-runtime | 9.0.10-r0 | — |
| Alpine v3.20 | dotnet8-runtime | 8.0.21-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | dotnet +5 | 8.0.121-1.amzn2023.0.1 | ALAS2023-2025-1231, ALAS2023-2025-1230 |
| Amazon Linux 2023 | dotnet-host +8 | 8.0.21-1.amzn2023.0.1 | ALAS2023-2025-1231, ALAS2023-2025-1230 |
| Amazon Linux 2023 | dotnet-hostfxr-9.0 +7 | 9.0.10-1.amzn2023.0.1 | ALAS2023-2025-1231 |
| Amazon Linux 2023 | dotnet-sdk-9.0 +4 | 9.0.111-1.amzn2023.0.1 | ALAS2023-2025-1231 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | dotnet-host +8 | 9.0.10-1.0.1.el10_0 | ELSA-2025-18153 |
| Oracle Linux 10 | dotnet-hostfxr-8.0 +7 | 8.0.21-1.0.1.el10_0 | ELSA-2025-18152 |
| Oracle Linux 10 | dotnet-sdk-8.0 +3 | 8.0.121-1.0.1.el10_0 | ELSA-2025-18152 |
| Oracle Linux 10 | dotnet-sdk-9.0 +5 | 9.0.111-1.0.1.el10_0 | ELSA-2025-18153 |
| Oracle Linux 9 | dotnet-host +8 | 9.0.10-1.0.1.el9_6 | ELSA-2025-18151 |
| Oracle Linux 9 | dotnet-hostfxr-8.0 +7 | 8.0.21-1.0.1.el9_6 | ELSA-2025-18149 |
| Oracle Linux 9 | dotnet-sdk-8.0 +3 | 8.0.121-1.0.1.el9_6 | ELSA-2025-18149 |
| Oracle Linux 9 | dotnet-sdk-9.0 +5 | 9.0.111-1.0.1.el9_6 | ELSA-2025-18151 |
| Oracle Linux 8 | dotnet +6 | 9.0.111-1.0.1.el8_10 | ELSA-2025-18150 |
| Oracle Linux 8 | dotnet-host +8 | 9.0.10-1.0.1.el8_10 | ELSA-2025-18150 |
| Oracle Linux 8 | dotnet-hostfxr-8.0 +7 | 8.0.21-1.0.1.el8_10 | ELSA-2025-18148 |
| Oracle Linux 8 | dotnet-sdk-8.0 +3 | 8.0.121-1.0.1.el8_10 | ELSA-2025-18148 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| NuGet | Microsoft.Build | >= 17.15.0-preview-25277-114, < 18.0.0-preview-25476-107 | 18.0.0-preview-25476-107 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build | >= 17.14.0, < 17.14.28 | 17.14.28 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build | >= 17.12.0, < 17.12.50 | 17.12.50 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build | >= 17.11.0, < 17.11.48 | 17.11.48 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build | >= 17.10.0, < 17.10.46 | 17.10.46 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build | >= 17.8.0, < 17.8.43 | 17.8.43 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Tasks.Core | >= 17.15.0-preview-25277-114, < 18.0.0-preview-25476-107 | 18.0.0-preview-25476-107 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Tasks.Core | >= 17.14.0, < 17.14.28 | 17.14.28 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Tasks.Core | >= 17.12.0, < 17.12.50 | 17.12.50 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Tasks.Core | >= 17.11.0, < 17.11.48 | 17.11.48 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Tasks.Core | >= 17.10.0, < 17.10.46 | 17.10.46 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Tasks.Core | >= 17.8.0, < 17.8.43 | 17.8.43 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Utilities.Core | >= 17.15.0-preview-25277-114, < 18.0.0-preview-25476-107 | 18.0.0-preview-25476-107 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Utilities.Core | >= 17.14.0, < 17.14.28 | 17.14.28 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Utilities.Core | >= 17.12.0, < 17.12.50 | 17.12.50 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Utilities.Core | >= 17.11.0, < 17.11.48 | 17.11.48 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Utilities.Core | >= 17.10.0, < 17.10.46 | 17.10.46 | GHSA-w3q9-fxm7-j8fq |
| NuGet | Microsoft.Build.Utilities.Core | >= 17.8.0, < 17.8.43 | 17.8.43 | GHSA-w3q9-fxm7-j8fq |
Advisories 35
- ALSA-2025:18152 Important: .NET 8.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:18153 Important: .NET 9.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:18149 Important: .NET 8.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:18151 Important: .NET 9.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:18148 Important: .NET 8.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:18150 Important: .NET 9.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:9205 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- RHSA-2026:9080 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- RHSA-2025:18256 Red Hat Security Advisory: .NET 8.0 security update Red Hat Security Advisories (RHSA) · Jul 4, 2026
- RHSA-2025:18153 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jul 4, 2026
- RHSA-2025:18152 Red Hat Security Advisory: .NET 8.0 security update Red Hat Security Advisories (RHSA) · Jul 4, 2026
- RHSA-2025:18150 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jul 4, 2026
- RHSA-2025:18151 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jul 4, 2026
- RHSA-2025:18148 Red Hat Security Advisory: .NET 8.0 security update Red Hat Security Advisories (RHSA) · Jul 4, 2026
- RHSA-2025:18149 Red Hat Security Advisory: .NET 8.0 security update Red Hat Security Advisories (RHSA) · Jul 4, 2026
- RHBA-2025:20993 Red Hat Bug Fix Advisory: .NET 10.0 bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jul 4, 2026
- RHBA-2025:20916 Red Hat Bug Fix Advisory: .NET 10.0 bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jul 4, 2026
- USN-7822-1 dotnet8, dotnet9, dotnet10 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- WID-SEC-2025-2278 Microsoft Developer Tools: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 21, 2026
- ALAS2023-2025-1230 Critical: dotnet8.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 23, 2025
- ALAS2023-2025-1231 Critical: dotnet9.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 23, 2025
- RLSA-2025:18153 Important: .NET 9.0 security update Rocky Linux Security Advisories · Oct 18, 2025
- RLSA-2025:18151 Important: .NET 9.0 security update Rocky Linux Security Advisories · Oct 18, 2025
- RLSA-2025:18152 Important: .NET 8.0 security update Rocky Linux Security Advisories · Oct 18, 2025
- RLSA-2025:18149 Important: .NET 8.0 security update Rocky Linux Security Advisories · Oct 18, 2025
- RLSA-2025:18148 Important: .NET 8.0 security update Rocky Linux Security Advisories · Oct 17, 2025
- RLSA-2025:18150 Important: .NET 9.0 security update Rocky Linux Security Advisories · Oct 17, 2025
- ELSA-2025-18151 Important: .NET 9.0 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 16, 2025
- ELSA-2025-18149 Important: .NET 8.0 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 16, 2025
- ELSA-2025-18150 Important: .NET 9.0 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 16, 2025
- ELSA-2025-18148 Important: .NET 8.0 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 16, 2025
- ELSA-2025-18153 Important: .NET 9.0 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Oct 16, 2025
- ELSA-2025-18152 Important: .NET 8.0 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Oct 16, 2025
- NCSC-2025-0313 Kwetsbaarheden verholpen in Microsoft Developer Tools NCSC-NL (Netherlands) · Oct 14, 2025
- MSRC-CVE-2025-55247 .NET Elevation of Privilege Vulnerability Microsoft Security Response Center · Oct 14, 2025
References
- .NET Elevation of Privilege Vulnerability vendor-advisory patch