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RHEL 9 : .NET 11.0 (RHSA-2026:99173)

high Nessus Plugin ID 379414

Synopsis

The remote Red Hat host is missing a security update.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:99173 advisory.

 .NET is a fast, lightweight and modular platform for creating cross platform applications that work on Linux, macOS and Windows. It particularly focuses on creating console applications, web applications and micro-services. .NET contains a runtime conforming to .NET Standards a set of framework libraries, an SDK containing compilers and a 'dotnet' application to drive everything.

 SDK version: 11.0.100~rc.2.26504.105 Runtime version: 11.0.0~rc.2.26504.105

 Security Fix(es):

 * .NET: .NET Elevation of Privilege Vulnerability (CVE-2026-62909)

 Bug Fix(es) and Enhancement(s):

 * Update .NET 11 to RC 1 [rhel-9.9.z] (JIRA:RHEL-267800)

 * Update .NET 11 to RC 2 [rhel-9.9.z] (JIRA:RHEL-277286)

 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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2026:99173

https://access.redhat.com/security/updates/classification/#low

https://bugzilla.redhat.com/show_bug.cgi?id=2512185

http://www.nessus.org/u?5350a38c

Plugin Details

Severity: High

ID: 379414

File Name: redhat-RHSA-2026-99173.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 11/12/2026

Updated: 11/12/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.75

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

Vector: CVSS2#AV:L/AC:H/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-62909

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:aspnetcore-runtime-11.0, p-cpe:/a:redhat:enterprise_linux:aspnetcore-runtime-dbg-11.0, p-cpe:/a:redhat:enterprise_linux:aspnetcore-targeting-pack-11.0, p-cpe:/a:redhat:enterprise_linux:dotnet-apphost-pack-11.0, p-cpe:/a:redhat:enterprise_linux:dotnet-host, p-cpe:/a:redhat:enterprise_linux:dotnet-hostfxr-11.0, p-cpe:/a:redhat:enterprise_linux:dotnet-runtime-11.0, p-cpe:/a:redhat:enterprise_linux:dotnet-runtime-dbg-11.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-11.0-source-built-artifacts, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-11.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-aot-11.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-dbg-11.0, p-cpe:/a:redhat:enterprise_linux:dotnet-targeting-pack-11.0, p-cpe:/a:redhat:enterprise_linux:dotnet-templates-11.0, p-cpe:/a:redhat:enterprise_linux:dotnet11.0

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 11/12/2026

Vulnerability Publication Date: 8/11/2026

Reference Information

CVE: CVE-2026-62909

CWE: 252

RHSA: 2026:99173