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Linux Distros Unpatched Vulnerability : CVE-2026-15811

medium Nessus Plugin ID 328674

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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 kronosnet's (version <=1.34) cryptographic configuration management. The framework does not correctly zero-out or wipe sensitive memory segments after executing changes to its cryptographic configuration. This omission leaves raw encryption keys resident in memory after the associated structures are freed. A local attacker capable of leveraging memory disclosure techniques could exploit this flaw to retrieve the active encryption key, allowing them to decrypt cluster network communications or inject malicious packets to cause severe high-availability cluster instability.
 (CVE-2026-15811)

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-2026-15811

https://security-tracker.debian.org/tracker/CVE-2026-15811

https://ubuntu.com/security/CVE-2026-15811

Plugin Details

Severity: Medium

ID: 328674

File Name: unpatched_CVE_2026_15811.nasl

Version: 1.4

Type: Local

Agent: unix

Family: Misc.

Published: 7/21/2026

Updated: 7/27/2026

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: 3.9

Percentile: 52.74

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.8

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

CVSS Score Source: CVE-2026-15811

CVSS v3

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5.3

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/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-2026-15811