RLSA-2026:21286

Synopsis

Important: .NET 8.0 security update

Description

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.127 and .NET Runtime 8.0.27.Security Fix(es):

* serialize-javascript: serialize-javascript: Denial of Service via specially crafted array-like object serialization (CVE-2026-34043)

* dotnet: .NET: infinite loop allows an attacker to cause a denial of service (CVE-2026-42899)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected products

Rocky Linux 10 aarch64 Rocky Linux 10 ppc64le Rocky Linux 10 riscv64 Rocky Linux 10 s390x Rocky Linux 10 x86_64

Fixes

2453284 2476605

CVEs

CVE-2026-34043 CVE-2026-42899

Affected packages

Rocky Linux 10 aarch64 - AppStream

aspnetcore-runtime-8.0-0:8.0.27-1.el10_2.aarch64.rpm dotnet8.0-0:8.0.127-1.el10_2.src.rpm dotnet-sdk-dbg-8.0-0:8.0.127-1.el10_2.aarch64.rpm dotnet-targeting-pack-8.0-0:8.0.27-1.el10_2.aarch64.rpm aspnetcore-targeting-pack-8.0-0:8.0.27-1.el10_2.aarch64.rpm dotnet-apphost-pack-8.0-debuginfo-0:8.0.27-1.el10_2.aarch64.rpm dotnet-runtime-8.0-0:8.0.27-1.el10_2.aarch64.rpm dotnet-sdk-8.0-debuginfo-0:8.0.127-1.el10_2.aarch64.rpm dotnet-runtime-8.0-debuginfo-0:8.0.27-1.el10_2.aarch64.rpm dotnet-runtime-dbg-8.0-0:8.0.27-1.el10_2.aarch64.rpm dotnet-templates-8.0-0:8.0.127-1.el10_2.aarch64.rpm dotnet-sdk-8.0-0:8.0.127-1.el10_2.aarch64.rpm dotnet8.0-debugsource-0:8.0.127-1.el10_2.aarch64.rpm dotnet-hostfxr-8.0-0:8.0.27-1.el10_2.aarch64.rpm dotnet-hostfxr-8.0-debuginfo-0:8.0.27-1.el10_2.aarch64.rpm aspnetcore-runtime-dbg-8.0-0:8.0.27-1.el10_2.aarch64.rpm dotnet-apphost-pack-8.0-0:8.0.27-1.el10_2.aarch64.rpm

Rocky Linux 10 ppc64le - AppStream

dotnet8.0-0:8.0.127-1.el10_2.src.rpm dotnet-targeting-pack-8.0-0:8.0.27-1.el10_2.ppc64le.rpm dotnet-templates-8.0-0:8.0.127-1.el10_2.ppc64le.rpm dotnet-runtime-8.0-0:8.0.27-1.el10_2.ppc64le.rpm dotnet-runtime-dbg-8.0-0:8.0.27-1.el10_2.ppc64le.rpm dotnet-apphost-pack-8.0-0:8.0.27-1.el10_2.ppc64le.rpm dotnet-hostfxr-8.0-0:8.0.27-1.el10_2.ppc64le.rpm aspnetcore-runtime-dbg-8.0-0:8.0.27-1.el10_2.ppc64le.rpm aspnetcore-targeting-pack-8.0-0:8.0.27-1.el10_2.ppc64le.rpm aspnetcore-runtime-8.0-0:8.0.27-1.el10_2.ppc64le.rpm dotnet8.0-debugsource-0:8.0.127-1.el10_2.ppc64le.rpm dotnet-apphost-pack-8.0-debuginfo-0:8.0.27-1.el10_2.ppc64le.rpm dotnet-sdk-8.0-0:8.0.127-1.el10_2.ppc64le.rpm dotnet-hostfxr-8.0-debuginfo-0:8.0.27-1.el10_2.ppc64le.rpm dotnet-runtime-8.0-debuginfo-0:8.0.27-1.el10_2.ppc64le.rpm dotnet-sdk-dbg-8.0-0:8.0.127-1.el10_2.ppc64le.rpm dotnet-sdk-8.0-debuginfo-0:8.0.127-1.el10_2.ppc64le.rpm

Rocky Linux 10 riscv64 - AppStream

dotnet8.0-0:8.0.127-1.el10_2.src.rpm

Rocky Linux 10 s390x - AppStream

dotnet8.0-0:8.0.127-1.el10_2.src.rpm dotnet-runtime-dbg-8.0-0:8.0.27-1.el10_2.s390x.rpm dotnet-hostfxr-8.0-0:8.0.27-1.el10_2.s390x.rpm aspnetcore-targeting-pack-8.0-0:8.0.27-1.el10_2.s390x.rpm dotnet-hostfxr-8.0-debuginfo-0:8.0.27-1.el10_2.s390x.rpm dotnet-sdk-8.0-0:8.0.127-1.el10_2.s390x.rpm dotnet-sdk-8.0-debuginfo-0:8.0.127-1.el10_2.s390x.rpm dotnet-apphost-pack-8.0-0:8.0.27-1.el10_2.s390x.rpm dotnet-templates-8.0-0:8.0.127-1.el10_2.s390x.rpm dotnet8.0-debugsource-0:8.0.127-1.el10_2.s390x.rpm aspnetcore-runtime-8.0-0:8.0.27-1.el10_2.s390x.rpm dotnet-runtime-8.0-debuginfo-0:8.0.27-1.el10_2.s390x.rpm dotnet-apphost-pack-8.0-debuginfo-0:8.0.27-1.el10_2.s390x.rpm dotnet-runtime-8.0-0:8.0.27-1.el10_2.s390x.rpm dotnet-sdk-dbg-8.0-0:8.0.127-1.el10_2.s390x.rpm dotnet-targeting-pack-8.0-0:8.0.27-1.el10_2.s390x.rpm aspnetcore-runtime-dbg-8.0-0:8.0.27-1.el10_2.s390x.rpm

Rocky Linux 10 x86_64 - AppStream

dotnet8.0-0:8.0.127-1.el10_2.src.rpm dotnet-sdk-dbg-8.0-0:8.0.127-1.el10_2.x86_64.rpm dotnet-targeting-pack-8.0-0:8.0.27-1.el10_2.x86_64.rpm dotnet-hostfxr-8.0-0:8.0.27-1.el10_2.x86_64.rpm aspnetcore-targeting-pack-8.0-0:8.0.27-1.el10_2.x86_64.rpm dotnet-apphost-pack-8.0-0:8.0.27-1.el10_2.x86_64.rpm dotnet-templates-8.0-0:8.0.127-1.el10_2.x86_64.rpm aspnetcore-runtime-dbg-8.0-0:8.0.27-1.el10_2.x86_64.rpm dotnet-runtime-8.0-debuginfo-0:8.0.27-1.el10_2.x86_64.rpm dotnet-hostfxr-8.0-debuginfo-0:8.0.27-1.el10_2.x86_64.rpm dotnet-runtime-8.0-0:8.0.27-1.el10_2.x86_64.rpm dotnet-apphost-pack-8.0-debuginfo-0:8.0.27-1.el10_2.x86_64.rpm dotnet8.0-debugsource-0:8.0.127-1.el10_2.x86_64.rpm dotnet-sdk-8.0-debuginfo-0:8.0.127-1.el10_2.x86_64.rpm dotnet-sdk-8.0-0:8.0.127-1.el10_2.x86_64.rpm aspnetcore-runtime-8.0-0:8.0.27-1.el10_2.x86_64.rpm dotnet-runtime-dbg-8.0-0:8.0.27-1.el10_2.x86_64.rpm

Rocky Linux 10 s390x - CRB

dotnet-sdk-8.0-source-built-artifacts-0:8.0.127-1.el10_2.s390x.rpm

Rocky Linux 10 aarch64 - CRB

dotnet-sdk-8.0-source-built-artifacts-0:8.0.127-1.el10_2.aarch64.rpm

Rocky Linux 10 ppc64le - CRB

dotnet-sdk-8.0-source-built-artifacts-0:8.0.127-1.el10_2.ppc64le.rpm

Rocky Linux 10 x86_64 - CRB

dotnet-sdk-8.0-source-built-artifacts-0:8.0.127-1.el10_2.x86_64.rpm