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OpenAdvisories

Description

Incorrect default permissions in ASP.NET Core allows an authorized attacker to elevate privileges locally.

Affected products

VendorProductAffectedFixed
Microsoft .NET 10.0 installed on Linux 10.0.0 – < 10.0.403 10.0.403
Microsoft .NET 10.0 installed on Mac OS 10.0.0 – < 10.0.403 10.0.403
Microsoft .NET 10.0 installed on Windows 10.0.0 – < 10.0.403 10.0.403
Microsoft .NET 11.0 installed on Linux 11.0.0-preview.1 – < 11.0.100-rc.3 11.0.100-rc.3
Microsoft .NET 11.0 installed on Mac OS 11.0.0-preview.1 – < 11.0.100-rc.3 11.0.100-rc.3
Microsoft .NET 11.0 installed on Windows 11.0.0-preview.1 – < 11.0.100-rc.3 11.0.100-rc.3
Microsoft .NET 8.0 installed on Linux 8.0.0 – < 8.0.427 8.0.427
Microsoft .NET 8.0 installed on Mac OS 8.0.0 – < 8.0.427 8.0.427
Microsoft .NET 8.0 installed on Windows 8.0.0 – < 8.0.427 8.0.427
Microsoft .NET 9.0 installed on Linux 9.0.0 – < 9.0.320 9.0.320
Microsoft .NET 9.0 installed on Mac OS 9.0.0 – < 9.0.320 9.0.320
Microsoft .NET 9.0 installed on Windows 9.0.0 – < 9.0.320 9.0.320
Microsoft .NET source-build Linux tarballs (all archive types) 8.0.100 – < 10.0.403-servicing.26523.112 10.0.403-servicing.26523.112
Microsoft ASP.NET Core runtime and targeting-pack Linux tarballs (Microsoft-published) 8.0.0 – < 9.0.22 9.0.22

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.

ReleasePackageFixed inAdvisory
Ubuntu 26.10 dotnet10 10.0.114-10.0.14-0ubuntu1~26.10.1 USN-8958-1
Ubuntu 26.10 dotnet11 11.0.100-11.0.0~rc3-0ubuntu1~26.10.1 USN-8958-1
Ubuntu 26.04 LTS dotnet10 10.0.114-10.0.14-0ubuntu1~26.04.1 USN-8958-1
Ubuntu 24.04 LTS dotnet10 10.0.114-10.0.14-0ubuntu1~24.04.1 USN-8958-1
Ubuntu 24.04 LTS dotnet8 8.0.133-8.0.33-0ubuntu1~24.04.1 USN-8958-1
Ubuntu 22.04 LTS dotnet6 +1 No fix yet —
Ubuntu 22.04 LTS dotnet8 8.0.133-8.0.33-0ubuntu1~22.04.1 USN-8958-1
ReleasePackageFixed inAdvisory
RHEL 10 dotnet-host +8 10.0.14-1.el10_2 RHSA-2026:98627, RHSA-2026:92438
RHEL 10 dotnet-hostfxr-11.0 +7 11.0.0~rc.3.26522.148-0.11.el10_3 RHSA-2026:98627
RHEL 10 dotnet-hostfxr-8.0 +7 8.0.33-1.el10_2 RHSA-2026:92428
RHEL 10 dotnet-hostfxr-9.0 +7 9.0.22-1.el10_2 RHSA-2026:92430
RHEL 10 dotnet10.0 +5 10.0.114-1.el10_2 RHSA-2026:92438
RHEL 10 dotnet11.0 +5 11.0.100~rc.3.26522.148-0.11.el10_3 RHSA-2026:98627
RHEL 10 dotnet8.0 +4 8.0.133-1.el10_2 RHSA-2026:92428
RHEL 10 dotnet9.0 +6 9.0.123-1.el10_2 RHSA-2026:92430
RHEL 9 dotnet-host +8 10.0.14-1.el9_8 RHSA-2026:99170, RHSA-2026:92432
RHEL 9 dotnet-hostfxr-11.0 +7 11.0.0~rc.3.26522.148-0.12.el9_9 RHSA-2026:99170
RHEL 9 dotnet-hostfxr-8.0 +7 8.0.33-1.el9_8 RHSA-2026:92492
RHEL 9 dotnet-hostfxr-9.0 +7 9.0.22-1.el9_8 RHSA-2026:92429
RHEL 9 dotnet10.0 +5 10.0.114-1.el9_8 RHSA-2026:92432
RHEL 9 dotnet11.0 +5 11.0.100~rc.3.26522.148-0.12.el9_9 RHSA-2026:99170
RHEL 9 dotnet8.0 +4 8.0.133-1.el9_8 RHSA-2026:92492
RHEL 9 dotnet9.0 +6 9.0.123-1.el9_8 RHSA-2026:92429
RHEL 8 dotnet +6 11.0.100~rc.3.26522.148-0.12.el8_10 RHSA-2026:92511
RHEL 8 dotnet-host +8 11.0.0~rc.3.26522.148-0.12.el8_10 RHSA-2026:92511
RHEL 8 dotnet-hostfxr-10.0 +7 10.0.14-1.el8_10 RHSA-2026:92431
RHEL 8 dotnet-hostfxr-8.0 +7 8.0.33-1.el8_10 RHSA-2026:92420
RHEL 8 dotnet-hostfxr-9.0 +7 9.0.22-1.el8_10 RHSA-2026:92427
RHEL 8 dotnet10.0 +5 10.0.114-1.el8_10 RHSA-2026:92431
RHEL 8 dotnet8.0 +4 8.0.133-1.el8_10 RHSA-2026:92420
RHEL 8 dotnet9.0 +6 9.0.123-1.el8_10 RHSA-2026:92427
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 10.0 EUS dotnet-host +8 9.0.22-1.el10_0 RHSA-2026:93458
RHEL 10.0 EUS dotnet-hostfxr-8.0 +7 8.0.33-1.el10_0 RHSA-2026:93455
RHEL 10.0 EUS dotnet8.0 +4 8.0.133-1.el10_0 RHSA-2026:93455
RHEL 10.0 EUS dotnet9.0 +6 9.0.123-1.el10_0 RHSA-2026:93458
RHEL 9.6 EUS dotnet-host +8 9.0.22-1.el9_6 RHSA-2026:93459
RHEL 9.6 EUS dotnet-hostfxr-8.0 +7 8.0.33-1.el9_6 RHSA-2026:93457
RHEL 9.6 EUS dotnet8.0 +4 8.0.133-1.el9_6 RHSA-2026:93457
RHEL 9.6 EUS dotnet9.0 +6 9.0.123-1.el9_6 RHSA-2026:93459
RHEL 9.4 E4S dotnet-host +8 8.0.33-1.el9_4 RHSA-2026:93456
RHEL 9.4 E4S dotnet8.0 +4 8.0.133-1.el9_4 RHSA-2026:93456
Red Hat Hardened Images 1 dotnet-hostfxr-8.0 +7 8.0.33-0.1.hum1 RHSA-2026:91709
Red Hat Hardened Images 1 dotnet8.0 +4 8.0.133-0.1.hum1 RHSA-2026:91709

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 10 dotnet-host +8 10.0.14-1.el10_2 ALSA-2026:92438
AlmaLinux 10 dotnet-hostfxr-8.0 +7 8.0.33-1.el10_2 ALSA-2026:92428
AlmaLinux 10 dotnet-hostfxr-9.0 +7 9.0.22-1.el10_2 ALSA-2026:92430
AlmaLinux 10 dotnet-sdk-10.0 +4 10.0.114-1.el10_2 ALSA-2026:92438
AlmaLinux 10 dotnet-sdk-8.0 +3 8.0.133-1.el10_2 ALSA-2026:92428
AlmaLinux 10 dotnet-sdk-9.0 +5 9.0.123-1.el10_2 ALSA-2026:92430
AlmaLinux 9 dotnet-host +8 10.0.14-1.el9_8 ALSA-2026:92432
AlmaLinux 9 dotnet-hostfxr-8.0 +7 8.0.33-1.el9_8 ALSA-2026:92492
AlmaLinux 9 dotnet-hostfxr-9.0 +7 9.0.22-1.el9_8 ALSA-2026:92429
AlmaLinux 9 dotnet-sdk-10.0 +4 10.0.114-1.el9_8 ALSA-2026:92432
AlmaLinux 9 dotnet-sdk-8.0 +3 8.0.133-1.el9_8 ALSA-2026:92492
AlmaLinux 9 dotnet-sdk-9.0 +5 9.0.123-1.el9_8 ALSA-2026:92429
AlmaLinux 8 dotnet +5 11.0.100~rc.3.26522.148-0.12.el8_10 ALSA-2026:92511
AlmaLinux 8 dotnet-host +8 11.0.0~rc.3.26522.148-0.12.el8_10 ALSA-2026:92511
AlmaLinux 8 dotnet-hostfxr-10.0 +7 10.0.14-1.el8_10 ALSA-2026:92431
AlmaLinux 8 dotnet-hostfxr-8.0 +7 8.0.33-1.el8_10 ALSA-2026:92420
AlmaLinux 8 dotnet-hostfxr-9.0 +7 9.0.22-1.el8_10 ALSA-2026:92427
AlmaLinux 8 dotnet-sdk-10.0 +4 10.0.114-1.el8_10 ALSA-2026:92431
AlmaLinux 8 dotnet-sdk-8.0 +3 8.0.133-1.el8_10 ALSA-2026:92420
AlmaLinux 8 dotnet-sdk-9.0 +5 9.0.123-1.el8_10 ALSA-2026:92427

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 10 dotnet-host +8 11.0.0~rc.3.26522.148-0.11.el10_3 RLSA-2026:98627
Rocky Linux 10 dotnet-sdk-11.0 +4 11.0.100~rc.3.26522.148-0.11.el10_3 RLSA-2026:98627
Rocky Linux 10 dotnet10.0 10.0.114-1.el10_2 RLSA-2026:92438
Rocky Linux 10 dotnet8.0 8.0.133-1.el10_2 RLSA-2026:92428
Rocky Linux 10 dotnet9.0 9.0.123-1.el10_2 RLSA-2026:92430
Rocky Linux 9 dotnet10.0 10.0.114-1.el9_8 RLSA-2026:92432
Rocky Linux 9 dotnet8.0 8.0.133-1.el9_8 RLSA-2026:92492
Rocky Linux 9 dotnet9.0 9.0.123-1.el9_8 RLSA-2026:92429
Rocky Linux 8 dotnet10.0 10.0.114-1.el8_10 RLSA-2026:92431
Rocky Linux 8 dotnet11.0 11.0.100~rc.3.26522.148-0.12.el8_10 RLSA-2026:92511
Rocky Linux 8 dotnet8.0 8.0.133-1.el8_10 RLSA-2026:92420
Rocky Linux 8 dotnet9.0 9.0.123-1.el8_10 RLSA-2026:92427
ReleasePackageFixed inAdvisory
Alpine v3.24 dotnet10-runtime 10.0.14-r0 —
Alpine v3.24 dotnet8-runtime 8.0.33-r0 —
Alpine v3.24 dotnet9-runtime 9.0.22-r0 —
Alpine v3.23 dotnet8-runtime 8.0.33-r0 —
Alpine v3.23 dotnet9-runtime 9.0.22-r0 —
Alpine v3.22 dotnet8-runtime 8.0.33-r0 —
Alpine v3.22 dotnet9-runtime 9.0.22-r0 —

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 dotnet +5 8.0.133-1.amzn2023.0.1 ALAS2023-2026-3374, ALAS2023-2026-3367, ALAS2023-2026-3366
Amazon Linux 2023 dotnet-host +8 8.0.33-1.amzn2023.0.1 ALAS2023-2026-3374, ALAS2023-2026-3367, ALAS2023-2026-3366
Amazon Linux 2023 dotnet-hostfxr-10.0 +7 10.0.14-1.amzn2023.0.1 ALAS2023-2026-3366
Amazon Linux 2023 dotnet-hostfxr-9.0 +7 9.0.22-1.amzn2023.0.1 ALAS2023-2026-3374
Amazon Linux 2023 dotnet-sdk-10.0 +4 10.0.114-1.amzn2023.0.1 ALAS2023-2026-3366
Amazon Linux 2023 dotnet-sdk-9.0 +4 9.0.123-1.amzn2023.0.1 ALAS2023-2026-3374

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 10 dotnet-host +8 10.0.14-1.0.1.el10_2 ELSA-2026-92438
Oracle Linux 10 dotnet-hostfxr-8.0 +7 8.0.33-1.0.1.el10_2 ELSA-2026-92428
Oracle Linux 10 dotnet-hostfxr-9.0 +7 9.0.22-1.0.1.el10_2 ELSA-2026-92430
Oracle Linux 10 dotnet-sdk-10.0 +4 10.0.114-1.0.1.el10_2 ELSA-2026-92438
Oracle Linux 10 dotnet-sdk-8.0 +3 8.0.133-1.0.1.el10_2 ELSA-2026-92428
Oracle Linux 10 dotnet-sdk-9.0 +5 9.0.123-1.0.1.el10_2 ELSA-2026-92430
Oracle Linux 9 dotnet-host +8 10.0.14-1.0.1.el9_8 ELSA-2026-92432
Oracle Linux 9 dotnet-hostfxr-8.0 +7 8.0.33-1.0.1.el9_8 ELSA-2026-92492
Oracle Linux 9 dotnet-hostfxr-9.0 +7 9.0.22-1.0.1.el9_8 ELSA-2026-92429
Oracle Linux 9 dotnet-sdk-10.0 +4 10.0.114-1.0.1.el9_8 ELSA-2026-92432
Oracle Linux 9 dotnet-sdk-8.0 +3 8.0.133-1.0.1.el9_8 ELSA-2026-92492
Oracle Linux 9 dotnet-sdk-9.0 +5 9.0.123-1.0.1.el9_8 ELSA-2026-92429
Oracle Linux 8 dotnet +5 10.0.114-1.0.2.el8_10 ELSA-2026-92431
Oracle Linux 8 dotnet-host +8 10.0.14-1.0.2.el8_10 ELSA-2026-92431
Oracle Linux 8 dotnet-hostfxr-8.0 +7 8.0.33-1.0.1.el8_10 ELSA-2026-92420
Oracle Linux 8 dotnet-hostfxr-9.0 +7 9.0.22-1.0.1.el8_10 ELSA-2026-92427
Oracle Linux 8 dotnet-sdk-8.0 +3 8.0.133-1.0.1.el8_10 ELSA-2026-92420
Oracle Linux 8 dotnet-sdk-9.0 +5 9.0.123-1.0.1.el8_10 ELSA-2026-92427

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 50

References