Detections
Analytics

Linux Distros Unpatched Vulnerability : CVE-2026-92707

medium Nessus Plugin ID 367354

Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.303 and 3.1.9, deserializing attacker- controlled MessagePack data as System.Object through PrimitiveObjectFormatter can cause excessive memory allocation. The formatter allocates an object[] from each declared array length before the configured object-graph depth limit rejects the input, while nested array headers can reuse the same trailing unread bytes to satisfy per-header length validation. A comparatively small payload can therefore keep many large arrays alive at once. When an attacker can submit such data repeatedly, the allocations can cause severe managed-heap pressure, excessive garbage collection, process termination, or loss of service. Exposure requires an application to deserialize untrusted data through the affected formatter path and permit repeated attacker-controlled submissions, such as a reachable ASP.NET Core SignalR hub method with an object parameter and AddMessagePackProtocol() enabled. This issue is fixed in versions 2.5.303 and 3.1.9.
 (CVE-2026-92707)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-92707

https://ubuntu.com/security/CVE-2026-92707

Plugin Details

Severity: Medium

ID: 367354

File Name: unpatched_CVE_2026_92707.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 10/19/2026

Updated: 10/20/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4

Percentile: 53.43

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-92707

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.9

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:8, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:dotnet10, p-cpe:/a:canonical:ubuntu_linux:dotnet11, p-cpe:/a:canonical:ubuntu_linux:dotnet6, p-cpe:/a:canonical:ubuntu_linux:dotnet7, p-cpe:/a:canonical:ubuntu_linux:dotnet8, p-cpe:/a:centos:centos:aspnetcore-runtime-10.0, p-cpe:/a:centos:centos:aspnetcore-runtime-8.0, p-cpe:/a:centos:centos:aspnetcore-runtime-9.0, p-cpe:/a:centos:centos:aspnetcore-runtime-dbg-10.0, p-cpe:/a:centos:centos:aspnetcore-runtime-dbg-8.0, p-cpe:/a:centos:centos:aspnetcore-runtime-dbg-9.0, p-cpe:/a:centos:centos:aspnetcore-targeting-pack-10.0, p-cpe:/a:centos:centos:aspnetcore-targeting-pack-8.0, p-cpe:/a:centos:centos:aspnetcore-targeting-pack-9.0, p-cpe:/a:centos:centos:dotnet-apphost-pack-10.0, p-cpe:/a:centos:centos:dotnet-apphost-pack-8.0, p-cpe:/a:centos:centos:dotnet-apphost-pack-9.0, p-cpe:/a:centos:centos:dotnet-host, p-cpe:/a:centos:centos:dotnet-hostfxr-10.0, p-cpe:/a:centos:centos:dotnet-hostfxr-8.0, p-cpe:/a:centos:centos:dotnet-hostfxr-9.0, p-cpe:/a:centos:centos:dotnet-runtime-10.0, p-cpe:/a:centos:centos:dotnet-runtime-8.0, p-cpe:/a:centos:centos:dotnet-runtime-9.0, p-cpe:/a:centos:centos:dotnet-runtime-dbg-10.0, p-cpe:/a:centos:centos:dotnet-runtime-dbg-8.0, p-cpe:/a:centos:centos:dotnet-runtime-dbg-9.0, p-cpe:/a:centos:centos:dotnet-sdk-10.0-source-built-artifacts, p-cpe:/a:centos:centos:dotnet-sdk-10.0, p-cpe:/a:centos:centos:dotnet-sdk-8.0-source-built-artifacts, p-cpe:/a:centos:centos:dotnet-sdk-8.0, p-cpe:/a:centos:centos:dotnet-sdk-9.0-source-built-artifacts, p-cpe:/a:centos:centos:dotnet-sdk-9.0, p-cpe:/a:centos:centos:dotnet-sdk-aot-10.0, p-cpe:/a:centos:centos:dotnet-sdk-aot-9.0, p-cpe:/a:centos:centos:dotnet-sdk-dbg-10.0, p-cpe:/a:centos:centos:dotnet-sdk-dbg-8.0, p-cpe:/a:centos:centos:dotnet-sdk-dbg-9.0, p-cpe:/a:centos:centos:dotnet-targeting-pack-10.0, p-cpe:/a:centos:centos:dotnet-targeting-pack-8.0, p-cpe:/a:centos:centos:dotnet-targeting-pack-9.0, p-cpe:/a:centos:centos:dotnet-templates-10.0, p-cpe:/a:centos:centos:dotnet-templates-8.0, p-cpe:/a:centos:centos:dotnet-templates-9.0, p-cpe:/a:centos:centos:dotnet10.0, p-cpe:/a:centos:centos:dotnet8.0, p-cpe:/a:centos:centos:dotnet9.0, p-cpe:/a:centos:centos:dotnet, p-cpe:/a:centos:centos:netstandard-targeting-pack-2.1, p-cpe:/a:redhat:enterprise_linux:aspnetcore-runtime-10.0, p-cpe:/a:redhat:enterprise_linux:aspnetcore-runtime-8.0, p-cpe:/a:redhat:enterprise_linux:aspnetcore-runtime-9.0, p-cpe:/a:redhat:enterprise_linux:aspnetcore-runtime-dbg-10.0, p-cpe:/a:redhat:enterprise_linux:aspnetcore-runtime-dbg-8.0, p-cpe:/a:redhat:enterprise_linux:aspnetcore-runtime-dbg-9.0, p-cpe:/a:redhat:enterprise_linux:aspnetcore-targeting-pack-10.0, p-cpe:/a:redhat:enterprise_linux:aspnetcore-targeting-pack-8.0, p-cpe:/a:redhat:enterprise_linux:aspnetcore-targeting-pack-9.0, p-cpe:/a:redhat:enterprise_linux:dotnet-apphost-pack-10.0, p-cpe:/a:redhat:enterprise_linux:dotnet-apphost-pack-8.0, p-cpe:/a:redhat:enterprise_linux:dotnet-apphost-pack-9.0, p-cpe:/a:redhat:enterprise_linux:dotnet-host, p-cpe:/a:redhat:enterprise_linux:dotnet-hostfxr-10.0, p-cpe:/a:redhat:enterprise_linux:dotnet-hostfxr-8.0, p-cpe:/a:redhat:enterprise_linux:dotnet-hostfxr-9.0, p-cpe:/a:redhat:enterprise_linux:dotnet-runtime-10.0, p-cpe:/a:redhat:enterprise_linux:dotnet-runtime-8.0, p-cpe:/a:redhat:enterprise_linux:dotnet-runtime-9.0, p-cpe:/a:redhat:enterprise_linux:dotnet-runtime-dbg-10.0, p-cpe:/a:redhat:enterprise_linux:dotnet-runtime-dbg-8.0, p-cpe:/a:redhat:enterprise_linux:dotnet-runtime-dbg-9.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-10.0-source-built-artifacts, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-10.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-8.0-source-built-artifacts, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-8.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-9.0-source-built-artifacts, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-9.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-aot-10.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-aot-9.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-dbg-10.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-dbg-8.0, p-cpe:/a:redhat:enterprise_linux:dotnet-sdk-dbg-9.0, p-cpe:/a:redhat:enterprise_linux:dotnet-targeting-pack-10.0, p-cpe:/a:redhat:enterprise_linux:dotnet-targeting-pack-8.0, p-cpe:/a:redhat:enterprise_linux:dotnet-targeting-pack-9.0, p-cpe:/a:redhat:enterprise_linux:dotnet-templates-10.0, p-cpe:/a:redhat:enterprise_linux:dotnet-templates-8.0, p-cpe:/a:redhat:enterprise_linux:dotnet-templates-9.0, p-cpe:/a:redhat:enterprise_linux:dotnet10.0, p-cpe:/a:redhat:enterprise_linux:dotnet8.0, p-cpe:/a:redhat:enterprise_linux:dotnet9.0, p-cpe:/a:redhat:enterprise_linux:dotnet, p-cpe:/a:redhat:enterprise_linux:netstandard-targeting-pack-2.1

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 10/15/2026

Reference Information

CVE: CVE-2026-92707