Linux Distros Unpatched Vulnerability : CVE-2026-15816

high Nessus Plugin ID 333326

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 flaw was found in dracut. The die() error-handling function writes its message into a shell script under the initramfs emergency-hook directory without properly shell-quoting it. When the message contains data derived from the DHCP ROOT_PATH option, an attacker on the adjacent network who controls a rogue DHCP server can inject a command-substitution sequence that executes as root the next time dracut sources its emergency hook scripts during standard boot-failure handling. (CVE-2026-15816)

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: High

ID: 333326

File Name: unpatched_CVE_2026_15816.nasl

Version: 1.5

Type: Local

Agent: unix

Family: Misc.

Published: 8/7/2026

Updated: 8/13/2026

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: 4.9

Percentile: 58.2

CVSS v2

Risk Factor: High

Base Score: 8.3

Temporal Score: 7.1

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

CVSS Score Source: CVE-2026-15816

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.9

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, 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:7, 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:7, p-cpe:/a:canonical:ubuntu_linux:dracut, p-cpe:/a:centos:centos:dracut-caps, p-cpe:/a:centos:centos:dracut-config-generic, p-cpe:/a:centos:centos:dracut-config-rescue, p-cpe:/a:centos:centos:dracut-fips-aesni, p-cpe:/a:centos:centos:dracut-fips, p-cpe:/a:centos:centos:dracut-network, p-cpe:/a:centos:centos:dracut-tools, p-cpe:/a:centos:centos:dracut, p-cpe:/a:debian:debian_linux:dracut, p-cpe:/a:redhat:enterprise_linux:dracut-caps, p-cpe:/a:redhat:enterprise_linux:dracut-config-generic, p-cpe:/a:redhat:enterprise_linux:dracut-config-rescue, p-cpe:/a:redhat:enterprise_linux:dracut-fips-aesni, p-cpe:/a:redhat:enterprise_linux:dracut-fips, p-cpe:/a:redhat:enterprise_linux:dracut-network, p-cpe:/a:redhat:enterprise_linux:dracut-tools, p-cpe:/a:redhat:enterprise_linux:dracut

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: 8/7/2026

Reference Information

CVE: CVE-2026-15816

Detections

Analytics