Description
Out-of-bounds read in .NET allows an unauthorized attacker to deny service over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | .NET 10.0 | 10.0.0 – < 10.0.4 | 10.0.4 |
| Microsoft | .NET 9.0 | 9.0.0 – < 9.0.14 | 9.0.14 |
| Microsoft | Microsoft.Bcl.Memory | 10.0.0 – < 10.0.4, 9.0.0 – < 9.0.14 | 10.0.4 |
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 25.10 | dotnet10 | 10.0.104-10.0.4-0ubuntu1~25.10.1 | — |
| Ubuntu 25.10 | dotnet9 | 9.0.115-9.0.14-0ubuntu1~25.10.1 | — |
| Ubuntu 24.04 LTS | dotnet10 | 10.0.104-10.0.4-0ubuntu1~24.04.1 | — |
| Ubuntu 22.04 LTS | dotnet7 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | dotnet-host +8 | 10.0.4-1.el10_1 | RHSA-2026:4453 |
| RHEL 10 | dotnet-hostfxr-9.0 +7 | 9.0.14-1.el10_1 | RHSA-2026:4450 |
| RHEL 10 | dotnet10.0 +5 | 10.0.104-1.el10_1 | RHSA-2026:4453 |
| RHEL 10 | dotnet9.0 +6 | 9.0.115-1.el10_1 | RHSA-2026:4450 |
| RHEL 9 | dotnet-host +8 | 10.0.4-1.el9_7 | RHSA-2026:4445 |
| RHEL 9 | dotnet-hostfxr-9.0 +7 | 9.0.14-1.el9_7 | RHSA-2026:4456 |
| RHEL 9 | dotnet10.0 +5 | 10.0.104-1.el9_7 | RHSA-2026:4445 |
| RHEL 9 | dotnet9.0 +6 | 9.0.115-1.el9_7 | RHSA-2026:4456 |
| RHEL 8 | dotnet +6 | 10.0.104-1.el8_10 | RHSA-2026:4458 |
| RHEL 8 | dotnet-host +8 | 10.0.4-1.el8_10 | RHSA-2026:4458 |
| RHEL 8 | dotnet-hostfxr-9.0 +7 | 9.0.14-1.el8_10 | RHSA-2026:4443 |
| RHEL 8 | dotnet9.0 +6 | 9.0.115-1.el8_10 | RHSA-2026:4443 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | dotnet-host +8 | 9.0.14-1.el10_0 | RHSA-2026:10083 |
| RHEL 10.0 EUS | dotnet9.0 +6 | 9.0.115-1.el10_0 | RHSA-2026:10083 |
| RHEL 9.6 EUS | dotnet-host +8 | 9.0.14-1.el9_6 | RHSA-2026:10085 |
| RHEL 9.6 EUS | dotnet9.0 +6 | 9.0.115-1.el9_6 | RHSA-2026:10085 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | dotnet-host +8 | 10.0.4-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux 10 | dotnet-hostfxr-9.0 +7 | 9.0.14-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux 10 | dotnet-sdk-10.0 +4 | 10.0.104-1.el10_1 | ALSA-2026:4453 |
| AlmaLinux 10 | dotnet-sdk-9.0 +5 | 9.0.115-1.el10_1 | ALSA-2026:4450 |
| AlmaLinux 9 | dotnet-host +8 | 10.0.4-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux 9 | dotnet-hostfxr-9.0 +7 | 9.0.14-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux 9 | dotnet-sdk-10.0 +4 | 10.0.104-1.el9_7 | ALSA-2026:4445 |
| AlmaLinux 9 | dotnet-sdk-9.0 +5 | 9.0.115-1.el9_7 | ALSA-2026:4456 |
| AlmaLinux 8 | dotnet +5 | 10.0.104-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux 8 | dotnet-host +8 | 10.0.4-1.el8_10 | ALSA-2026:4458 |
| AlmaLinux 8 | dotnet-hostfxr-9.0 +7 | 9.0.14-1.el8_10 | ALSA-2026:4443 |
| AlmaLinux 8 | dotnet-sdk-9.0 +5 | 9.0.115-1.el8_10 | ALSA-2026:4443 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | dotnet10.0 | 10.0.104-1.el10_1 | RLSA-2026:4453 |
| Rocky Linux 10 | dotnet9.0 | 9.0.115-1.el10_1 | RLSA-2026:4450 |
| Rocky Linux 9 | dotnet10.0 | 10.0.104-1.el9_7 | RLSA-2026:4445 |
| Rocky Linux 9 | dotnet9.0 | 9.0.115-1.el9_7 | RLSA-2026:4456 |
| Rocky Linux 8 | dotnet10.0 | 10.0.104-1.el8_10 | RLSA-2026:4458 |
| Rocky Linux 8 | dotnet9.0 | 9.0.115-1.el8_10 | RLSA-2026:4443 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | dotnet10-runtime | 10.0.4-r0 | — |
| Alpine v3.24 | dotnet9-runtime | 9.0.14-r0 | — |
| Alpine v3.23 | dotnet10-runtime | 10.0.4-r0 | — |
| Alpine v3.23 | dotnet9-runtime | 9.0.14-r0 | — |
| Alpine v3.22 | dotnet9-runtime | 9.0.14-r0 | — |
| Alpine v3.21 | dotnet9-runtime | 9.0.14-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | dotnet +6 | 9.0.115-1.amzn2023.0.1 | ALAS2023-2026-1506 |
| Amazon Linux 2023 | dotnet-host +8 | 9.0.14-1.amzn2023.0.1 | ALAS2023-2026-1506 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | dotnet-host +8 | 10.0.4-1.0.1.el10_1 | ELSA-2026-4453 |
| Oracle Linux 10 | dotnet-hostfxr-9.0 +7 | 9.0.14-1.0.1.el10_1 | ELSA-2026-4450 |
| Oracle Linux 10 | dotnet-sdk-10.0 +4 | 10.0.104-1.0.1.el10_1 | ELSA-2026-4453 |
| Oracle Linux 10 | dotnet-sdk-9.0 +5 | 9.0.115-1.0.1.el10_1 | ELSA-2026-4450 |
| Oracle Linux 9 | dotnet-host +8 | 10.0.4-1.0.1.el9_7 | ELSA-2026-4445 |
| Oracle Linux 9 | dotnet-hostfxr-9.0 +7 | 9.0.14-1.0.1.el9_7 | ELSA-2026-4456 |
| Oracle Linux 9 | dotnet-sdk-10.0 +4 | 10.0.104-1.0.1.el9_7 | ELSA-2026-4445 |
| Oracle Linux 9 | dotnet-sdk-9.0 +5 | 9.0.115-1.0.1.el9_7 | ELSA-2026-4456 |
| Oracle Linux 8 | dotnet +5 | 10.0.104-1.0.1.el8_10 | ELSA-2026-4458 |
| Oracle Linux 8 | dotnet-host +8 | 10.0.4-1.0.1.el8_10 | ELSA-2026-4458 |
| Oracle Linux 8 | dotnet-hostfxr-9.0 +7 | 9.0.14-1.0.1.el8_10 | ELSA-2026-4443 |
| Oracle Linux 8 | dotnet-sdk-9.0 +5 | 9.0.115-1.0.1.el8_10 | ELSA-2026-4443 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | dotnet-bootstrap-9 | 9.0.115-r0 | — |
Affected packages
Advisories 31
- ALSA-2026:4450 Important: .NET 9.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:4453 Important: .NET 10.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:4445 Important: .NET 10.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:4456 Important: .NET 9.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:4443 Important: .NET 9.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:4458 Important: .NET 10.0 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:4458 Red Hat Security Advisory: .NET 10.0 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:4456 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:4453 Red Hat Security Advisory: .NET 10.0 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:4450 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:4445 Red Hat Security Advisory: .NET 10.0 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:4443 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:10085 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:10083 Red Hat Security Advisory: .NET 9.0 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- VDE-2026-064 METTLER TOLEDO: LabX Standard Report on External Component Analysis - v21.3 CERT@VDE · Jun 9, 2026
- WID-SEC-2026-0657 Microsoft ASP.NET und .NET: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 27, 2026
- ALAS2023-2026-1506 Important: dotnet9.0 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 1, 2026
- RLSA-2026:4456 Important: .NET 9.0 security update Rocky Linux Security Advisories · Mar 23, 2026
- RLSA-2026:4443 Important: .NET 9.0 security update Rocky Linux Security Advisories · Mar 23, 2026
- RLSA-2026:4445 Important: .NET 10.0 security update Rocky Linux Security Advisories · Mar 23, 2026
- RLSA-2026:4450 Important: .NET 9.0 security update Rocky Linux Security Advisories · Mar 23, 2026
- RLSA-2026:4453 Important: .NET 10.0 security update Rocky Linux Security Advisories · Mar 23, 2026
- RLSA-2026:4458 Important: .NET 10.0 security update Rocky Linux Security Advisories · Mar 23, 2026
- ELSA-2026-4443 Important: .NET 9.0 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Mar 13, 2026
- ELSA-2026-4453 Important: .NET 10.0 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Mar 12, 2026
- ELSA-2026-4450 Important: .NET 9.0 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Mar 12, 2026
- ELSA-2026-4456 Important: .NET 9.0 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Mar 12, 2026
- ELSA-2026-4445 Important: .NET 10.0 security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Mar 12, 2026
- ELSA-2026-4458 Important: .NET 10.0 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Mar 12, 2026
- NCSC-2026-0085 Kwetsbaarheden verholpen in Microsoft Developer tools NCSC-NL (Netherlands) · Mar 10, 2026
- MSRC-CVE-2026-26127 .NET Denial of Service Vulnerability Microsoft Security Response Center · Mar 10, 2026
References
- .NET Denial of Service Vulnerability vendor-advisory patch