Linux Distros Unpatched Vulnerability : CVE-2026-15812

medium Nessus Plugin ID 328673

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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.

- A vulnerability was found in the internal Access Control List (ACL) subsystem of kronosnet (Version affected: <= 1.34). When the framework is explicitly configured to manage dynamic links (accepting network traffic from any IP address) without network payload encryption, the validation architecture implicitly trusts the link ID provided within incoming data packets. A remote, unauthenticated attacker can exploit this lack of validation by spoofing a legitimate link ID inside crafted network frames. This allows the attacker to fully bypass the ACL framework and inject arbitrary data packets into the application layer, potentially leading to data corruption or service instabilities. (CVE-2026-15812)

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

Solution

There is no known solution at this time.

Plugin Details

Severity: Medium

ID: 328673

File Name: unpatched_CVE_2026_15812.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 7/21/2026

Updated: 7/25/2026

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: Low

Score: 2.1

Percentile: 7.87

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.4

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

CVSS Score Source: CVE-2026-15812

CVSS v3

Risk Factor: Medium

Base Score: 4.8

Temporal Score: 4.4

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, 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:debian:debian_linux:11.0, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:canonical:ubuntu_linux:kronosnet, p-cpe:/a:centos:centos:libknet1-compress-bzip2-plugin, p-cpe:/a:centos:centos:libknet1-compress-lz4-plugin, p-cpe:/a:centos:centos:libknet1-compress-lzma-plugin, p-cpe:/a:centos:centos:libknet1-compress-lzo2-plugin, p-cpe:/a:centos:centos:libknet1-compress-plugins-all, p-cpe:/a:centos:centos:libknet1-compress-zlib-plugin, p-cpe:/a:centos:centos:libknet1-compress-zstd-plugin, p-cpe:/a:centos:centos:libknet1-crypto-nss-plugin, p-cpe:/a:centos:centos:libknet1-crypto-openssl-plugin, p-cpe:/a:centos:centos:libknet1-crypto-plugins-all, p-cpe:/a:centos:centos:libknet1-devel, p-cpe:/a:centos:centos:libknet1-plugins-all, p-cpe:/a:centos:centos:libknet1, p-cpe:/a:centos:centos:libnozzle1, p-cpe:/a:debian:debian_linux:kronosnet, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-bzip2-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-lz4-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-lzma-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-lzo2-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-plugins-all, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-zlib-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-compress-zstd-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-crypto-nss-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-crypto-openssl-plugin, p-cpe:/a:redhat:enterprise_linux:libknet1-crypto-plugins-all, p-cpe:/a:redhat:enterprise_linux:libknet1-devel, p-cpe:/a:redhat:enterprise_linux:libknet1-plugins-all, p-cpe:/a:redhat:enterprise_linux:libknet1, p-cpe:/a:redhat:enterprise_linux:libnozzle1

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: 7/20/2026

Reference Information

CVE: CVE-2026-15812

Detections

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