Description
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | .NET 10.0 runtime | 10.0.0 – < 10.0.9 | 10.0.9 |
| Microsoft | .NET 8.0 | 8.0 – < 8.0.28 | 8.0.28 |
| Microsoft | .NET 8.0 runtime | 8.0.0 – < 8.0.28 | 8.0.28 |
| Microsoft | .NET 9.0 runtime | 9.0.0 – < 9.0.17 | 9.0.17 |
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 | 10.0.109-10.0.9-0ubuntu1 | — |
| Ubuntu 26.04 LTS | dotnet10 | 10.0.109-10.0.9-0ubuntu1~26.04.1 | — |
| Ubuntu 25.10 | dotnet10 | 10.0.109-10.0.9-0ubuntu1~25.10.1 | — |
| Ubuntu 25.10 | dotnet8 | 8.0.128-8.0.28-0ubuntu1~25.10.1 | — |
| Ubuntu 25.10 | dotnet9 | 9.0.118-9.0.17-0ubuntu1~25.10.1 | — |
| Ubuntu 24.04 LTS | dotnet10 | 10.0.109-10.0.9-0ubuntu1~24.04.1 | — |
| Ubuntu 24.04 LTS | dotnet8 | 8.0.128-8.0.28-0ubuntu1~24.04.1 | — |
| Ubuntu 22.04 LTS | dotnet6 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | dotnet8 | 8.0.128-8.0.28-0ubuntu1~22.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | dotnet-host +8 | 10.0.9-1.el10_2 | RHSA-2026:25115 |
| RHEL 10 | dotnet-hostfxr-8.0 +7 | 8.0.28-1.el10_2 | RHSA-2026:25111 |
| RHEL 10 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.el10_2 | RHSA-2026:25112 |
| RHEL 10 | dotnet10.0 +5 | 10.0.109-1.el10_2 | RHSA-2026:25115 |
| RHEL 10 | dotnet8.0 +4 | 8.0.128-1.el10_2 | RHSA-2026:25111 |
| RHEL 10 | dotnet9.0 +6 | 9.0.118-1.el10_2 | RHSA-2026:25112 |
| RHEL 9 | dotnet-host +8 | 10.0.9-1.el9_8 | RHSA-2026:25222 |
| RHEL 9 | dotnet-hostfxr-8.0 +7 | 8.0.28-1.el9_8 | RHSA-2026:25220 |
| RHEL 9 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.el9_8 | RHSA-2026:25221 |
| RHEL 9 | dotnet10.0 +5 | 10.0.109-1.el9_8 | RHSA-2026:25222 |
| RHEL 9 | dotnet8.0 +4 | 8.0.128-1.el9_8 | RHSA-2026:25220 |
| RHEL 9 | dotnet9.0 +6 | 9.0.118-1.el9_8 | RHSA-2026:25221 |
| RHEL 8 | dotnet +6 | 10.0.109-1.el8_10 | RHSA-2026:25114 |
| RHEL 8 | dotnet-host +8 | 10.0.9-1.el8_10 | RHSA-2026:25114 |
| RHEL 8 | dotnet-hostfxr-8.0 +7 | 8.0.28-1.el8_10 | RHSA-2026:25110 |
| RHEL 8 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.el8_10 | RHSA-2026:25113 |
| RHEL 8 | dotnet8.0 +4 | 8.0.128-1.el8_10 | RHSA-2026:25110 |
| RHEL 8 | dotnet9.0 +6 | 9.0.118-1.el8_10 | RHSA-2026:25113 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | dotnet-host +8 | 9.0.17-1.el10_0 | RHSA-2026:28009 |
| RHEL 10.0 EUS | dotnet-hostfxr-8.0 +7 | 8.0.28-1.el10_0 | RHSA-2026:28007 |
| RHEL 10.0 EUS | dotnet8.0 +4 | 8.0.128-1.el10_0 | RHSA-2026:28007 |
| RHEL 10.0 EUS | dotnet9.0 +6 | 9.0.118-1.el10_0 | RHSA-2026:28009 |
| RHEL 9.6 EUS | dotnet-host +8 | 9.0.17-1.el9_6 | RHSA-2026:28051 |
| RHEL 9.6 EUS | dotnet-hostfxr-8.0 +7 | 8.0.28-1.el9_6 | RHSA-2026:28011 |
| RHEL 9.6 EUS | dotnet8.0 +4 | 8.0.128-1.el9_6 | RHSA-2026:28011 |
| RHEL 9.6 EUS | dotnet9.0 +6 | 9.0.118-1.el9_6 | RHSA-2026:28051 |
| RHEL 9.4 E4S | dotnet-host +8 | 8.0.28-1.el9_4 | RHSA-2026:28227 |
| RHEL 9.4 E4S | dotnet8.0 +4 | 8.0.128-1.el9_4 | RHSA-2026:28227 |
| Red Hat Hardened Images 1 | dotnet10.0 +5 | 10.0.109-1.hum1 | RHSA-2026:26638 |
| Red Hat Hardened Images 1 | dotnet8.0 +4 | 8.0.128-1.hum1 | RHSA-2026:26994 |
| Red Hat Hardened Images 1 | dotnet9.0 | 9.0.117-1.hum1 | RHSA-2026:17527 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | dotnet-host +8 | 10.0.9-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux 10 | dotnet-hostfxr-8.0 +7 | 8.0.28-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux 10 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux 10 | dotnet-sdk-10.0 +4 | 10.0.109-1.el10_2 | ALSA-2026:25115 |
| AlmaLinux 10 | dotnet-sdk-8.0 +3 | 8.0.128-1.el10_2 | ALSA-2026:25111 |
| AlmaLinux 10 | dotnet-sdk-9.0 +5 | 9.0.118-1.el10_2 | ALSA-2026:25112 |
| AlmaLinux 9 | dotnet-host +8 | 10.0.9-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux 9 | dotnet-hostfxr-8.0 +7 | 8.0.28-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux 9 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux 9 | dotnet-sdk-10.0 +4 | 10.0.109-1.el9_8 | ALSA-2026:25222 |
| AlmaLinux 9 | dotnet-sdk-8.0 +3 | 8.0.128-1.el9_8 | ALSA-2026:25220 |
| AlmaLinux 9 | dotnet-sdk-9.0 +5 | 9.0.118-1.el9_8 | ALSA-2026:25221 |
| AlmaLinux 8 | dotnet +5 | 10.0.109-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux 8 | dotnet-host +8 | 10.0.9-1.el8_10 | ALSA-2026:25114 |
| AlmaLinux 8 | dotnet-hostfxr-8.0 +7 | 8.0.28-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux 8 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.el8_10 | ALSA-2026:25113 |
| AlmaLinux 8 | dotnet-sdk-8.0 +3 | 8.0.128-1.el8_10 | ALSA-2026:25110 |
| AlmaLinux 8 | dotnet-sdk-9.0 +5 | 9.0.118-1.el8_10 | ALSA-2026:25113 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | dotnet10.0 | 10.0.109-1.el10_2 | RLSA-2026:25115 |
| Rocky Linux 10 | dotnet8.0 | 8.0.128-1.el10_2 | RLSA-2026:25111 |
| Rocky Linux 10 | dotnet9.0 | 9.0.118-1.el10_2 | RLSA-2026:25112 |
| Rocky Linux 9 | dotnet10.0 | 10.0.109-1.el9_8 | RLSA-2026:25222 |
| Rocky Linux 9 | dotnet8.0 | 8.0.128-1.el9_8 | RLSA-2026:25220 |
| Rocky Linux 9 | dotnet9.0 | 9.0.118-1.el9_8 | RLSA-2026:25221 |
| Rocky Linux 8 | dotnet10.0 | 10.0.109-1.el8_10 | RLSA-2026:25114 |
| Rocky Linux 8 | dotnet8.0 | 8.0.128-1.el8_10 | RLSA-2026:25110 |
| Rocky Linux 8 | dotnet9.0 | 9.0.118-1.el8_10 | RLSA-2026:25113 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dotnet10-runtime | 10.0.9-r0 | — |
| Alpine v3.24 | dotnet8-runtime | 8.0.28-r0 | — |
| Alpine v3.24 | dotnet9-runtime | 9.0.17-r0 | — |
| Alpine v3.23 | dotnet10-runtime | 10.0.9-r0 | — |
| Alpine v3.23 | dotnet8-runtime | 8.0.28-r0 | — |
| Alpine v3.23 | dotnet9-runtime | 9.0.17-r0 | — |
| Alpine v3.22 | dotnet8-runtime | 8.0.28-r0 | — |
| Alpine v3.22 | dotnet9-runtime | 9.0.17-r0 | — |
| Alpine v3.21 | dotnet9-runtime | 9.0.17-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | dotnet +5 | 8.0.128-1.amzn2023.0.1 | ALAS2023-2026-1869, ALAS2023-2026-1868, ALAS2023-2026-1867 |
| Amazon Linux 2023 | dotnet-host +8 | 8.0.28-1.amzn2023.0.1 | ALAS2023-2026-1869, ALAS2023-2026-1868, ALAS2023-2026-1867 |
| Amazon Linux 2023 | dotnet-hostfxr-10.0 +7 | 10.0.9-1.amzn2023.0.1 | ALAS2023-2026-1867 |
| Amazon Linux 2023 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.amzn2023.0.2 | ALAS2023-2026-1868 |
| Amazon Linux 2023 | dotnet-sdk-10.0 +4 | 10.0.109-1.amzn2023.0.1 | ALAS2023-2026-1867 |
| Amazon Linux 2023 | dotnet-sdk-9.0 +4 | 9.0.118-1.amzn2023.0.2 | ALAS2023-2026-1868 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | dotnet-host +8 | 10.0.9-1.0.1.el10_2 | ELSA-2026-25115 |
| Oracle Linux 10 | dotnet-hostfxr-8.0 +7 | 8.0.28-1.0.1.el10_2 | ELSA-2026-25111 |
| Oracle Linux 10 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.0.1.el10_2 | ELSA-2026-25112 |
| Oracle Linux 10 | dotnet-sdk-10.0 +4 | 10.0.109-1.0.1.el10_2 | ELSA-2026-25115 |
| Oracle Linux 10 | dotnet-sdk-8.0 +3 | 8.0.128-1.0.1.el10_2 | ELSA-2026-25111 |
| Oracle Linux 10 | dotnet-sdk-9.0 +5 | 9.0.118-1.0.1.el10_2 | ELSA-2026-25112 |
| Oracle Linux 9 | dotnet-host +8 | 10.0.9-1.0.1.el9_8 | ELSA-2026-25222 |
| Oracle Linux 9 | dotnet-hostfxr-8.0 +7 | 8.0.28-1.0.1.el9_8 | ELSA-2026-25220 |
| Oracle Linux 9 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.0.1.el9_8 | ELSA-2026-25221 |
| Oracle Linux 9 | dotnet-sdk-10.0 +4 | 10.0.109-1.0.1.el9_8 | ELSA-2026-25222 |
| Oracle Linux 9 | dotnet-sdk-8.0 +3 | 8.0.128-1.0.1.el9_8 | ELSA-2026-25220 |
| Oracle Linux 9 | dotnet-sdk-9.0 +5 | 9.0.118-1.0.1.el9_8 | ELSA-2026-25221 |
| Oracle Linux 8 | dotnet +5 | 10.0.109-1.0.1.el8_10 | ELSA-2026-25114 |
| Oracle Linux 8 | dotnet-host +8 | 10.0.9-1.0.1.el8_10 | ELSA-2026-25114 |
| Oracle Linux 8 | dotnet-hostfxr-8.0 +7 | 8.0.28-1.0.1.el8_10 | ELSA-2026-25110 |
| Oracle Linux 8 | dotnet-hostfxr-9.0 +7 | 9.0.17-1.0.1.el8_10 | ELSA-2026-25113 |
| Oracle Linux 8 | dotnet-sdk-8.0 +3 | 8.0.128-1.0.1.el8_10 | ELSA-2026-25110 |
| Oracle Linux 8 | dotnet-sdk-9.0 +5 | 9.0.118-1.0.1.el8_10 | ELSA-2026-25113 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | dotnet-bootstrap-8 | 8.0.129-r0 | — |
| Wolfi rolling | dotnet-bootstrap-9 | 9.0.119-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| NuGet | Microsoft.NETCore.App.Runtime.linux-x64 | >= 8.0.0, < 8.0.28 | 8.0.28 | GHSA-7q4v-2mr6-5gpx |
| NuGet | Microsoft.NETCore.App.Runtime.linux-x64 | >= 9.0.0, < 9.0.17 | 9.0.17 | GHSA-7q4v-2mr6-5gpx |
| NuGet | Microsoft.NETCore.App.Runtime.linux-x64 | >= 10.0.0, < 10.0.9 | 10.0.9 | GHSA-7q4v-2mr6-5gpx |
| NuGet | Microsoft.NETCore.App.Runtime.osx-arm64 | >= 8.0.0, < 8.0.28 | 8.0.28 | GHSA-7q4v-2mr6-5gpx |
| NuGet | Microsoft.NETCore.App.Runtime.osx-arm64 | >= 9.0.0, < 9.0.17 | 9.0.17 | GHSA-7q4v-2mr6-5gpx |
| NuGet | Microsoft.NETCore.App.Runtime.osx-arm64 | >= 10.0.0, < 10.0.9 | 10.0.9 | GHSA-7q4v-2mr6-5gpx |
| NuGet | Microsoft.NETCore.App.Runtime.win-x64 | >= 8.0.0, < 8.0.28 | 8.0.28 | GHSA-7q4v-2mr6-5gpx |
| NuGet | Microsoft.NETCore.App.Runtime.win-x64 | >= 9.0.0, < 9.0.17 | 9.0.17 | GHSA-7q4v-2mr6-5gpx |
| NuGet | Microsoft.NETCore.App.Runtime.win-x64 | >= 10.0.0, < 10.0.9 | 10.0.9 | GHSA-7q4v-2mr6-5gpx |
Advisories 50
- ALSA-2026:25221 Important: .NET 9.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:25222 Important: .NET 10.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:25220 Important: .NET 8.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:25112 Important: .NET 9.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:25115 Important: .NET 10.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:25111 Important: .NET 8.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:25114 Important: .NET 10.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:25110 Important: .NET 8.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:25113 Important: .NET 9.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:26638 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:26994 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:17527 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 6, 2026
- WID-SEC-2026-1845 Microsoft DeveloperTools: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 16, 2026
- ELSA-2026-25115 Important: .NET 10.0 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- ELSA-2026-25112 Important: .NET 9.0 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- ELSA-2026-25111 Important: .NET 8.0 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- RHSA-2026:28227 Red Hat Security Advisory: .NET 8.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:28051 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:28011 Red Hat Security Advisory: .NET 8.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:28009 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:28007 Red Hat Security Advisory: .NET 8.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:25221 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:25222 Red Hat Security Advisory: .NET 10.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:25220 Red Hat Security Advisory: .NET 8.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:25115 Red Hat Security Advisory: .NET 10.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:25114 Red Hat Security Advisory: .NET 10.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:25113 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:25111 Red Hat Security Advisory: .NET 8.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:25112 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- RHSA-2026:25110 Red Hat Security Advisory: .NET 8.0 security update Red Hat Security Advisories (RHSA) · Jul 2, 2026
- ELSA-2026-25222 Important: .NET 10.0 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 23, 2026
- ELSA-2026-25221 Important: .NET 9.0 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 23, 2026
- ELSA-2026-25220 Important: .NET 8.0 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 23, 2026
- ALAS2023-2026-1868 Important: dotnet9.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- ALAS2023-2026-1869 Important: dotnet8.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- ALAS2023-2026-1867 Important: dotnet10.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- RLSA-2026:25221 Important: .NET 9.0 security update Rocky Linux Security Advisories · Jun 13, 2026
- RLSA-2026:25111 Important: .NET 8.0 security update Rocky Linux Security Advisories · Jun 13, 2026
- RLSA-2026:25220 Important: .NET 8.0 security update Rocky Linux Security Advisories · Jun 13, 2026
- RLSA-2026:25222 Important: .NET 10.0 security update Rocky Linux Security Advisories · Jun 13, 2026
- RLSA-2026:25112 Important: .NET 9.0 security update Rocky Linux Security Advisories · Jun 13, 2026
- RLSA-2026:25115 Important: .NET 10.0 security update Rocky Linux Security Advisories · Jun 13, 2026
- RLSA-2026:25110 Important: .NET 8.0 security update Rocky Linux Security Advisories · Jun 12, 2026
- RLSA-2026:25113 Important: .NET 9.0 security update Rocky Linux Security Advisories · Jun 12, 2026
- RLSA-2026:25114 Important: .NET 10.0 security update Rocky Linux Security Advisories · Jun 12, 2026
- ELSA-2026-25114 Important: .NET 10.0 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 11, 2026
- ELSA-2026-25113 Important: .NET 9.0 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 11, 2026
- ELSA-2026-25110 Important: .NET 8.0 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 11, 2026
- NCSC-2026-0184 Kwetsbaarheden verholpen in Microsoft Developer Tools NCSC-NL (Netherlands) · Jun 9, 2026
- MSRC-CVE-2026-45491 .NET Tampering Vulnerability Microsoft Security Response Center · Jun 9, 2026
References
- .NET Tampering Vulnerability vendor-advisory patch