Amazon Linux 2 : dracut, --advisory ALAS2-2026-3812 (ALAS-2026-3812)

high Nessus Plugin ID 328826

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of dracut installed on the remote host is prior to 033-535. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3812 advisory.

A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP (Dynamic Host Configuration Protocol) options, such as a malicious hostname, to a system using dracut's legacy DHCP path. These options are improperly handled and written into temporary shell scripts without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs, potentially compromising the system's boot and network behavior. (CVE-2026-6893)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update dracut' or or 'yum update --advisory ALAS2-2026-3812' to update your system.

Plugin Details

Severity: High

ID: 328826

File Name: al2_ALAS-2026-3812.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 7/21/2026

Updated: 7/21/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.04

CVSS v2

Risk Factor: High

Base Score: 8.3

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-6893

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:O/RC:C

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:dracut-caps, p-cpe:/a:amazon:linux:dracut-config-generic, p-cpe:/a:amazon:linux:dracut-config-rescue, p-cpe:/a:amazon:linux:dracut-debuginfo, p-cpe:/a:amazon:linux:dracut-fips-aesni, p-cpe:/a:amazon:linux:dracut-fips, p-cpe:/a:amazon:linux:dracut-network, p-cpe:/a:amazon:linux:dracut-tools, p-cpe:/a:amazon:linux:dracut

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/20/2026

Vulnerability Publication Date: 6/10/2026

Reference Information

CVE: CVE-2026-6893

Detections

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