Amazon Linux 2 : edk2 (ALAS-2026-4047)

critical Nessus Plugin ID 374352

Synopsis

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

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-4047 advisory.

EDK2 contains a vulnerability in BIOS where a user may cause Out-of-boundsWrite, ClassicBuffer Overflow, and Incorrect Calculation of Buffer Size by remote access. Successful exploitation of this vulnerabilitycan lead to arbitrarycode execution. It could also impactConfidentiality,Integrity,and Availability. (CVE-2026-97631)

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 edk2' or or 'yum update --advisory ALAS2-2026-4047' to update your system.

Plugin Details

Severity: Critical

ID: 374352

File Name: al2_ALAS-2026-4047.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 10/30/2026

Updated: 10/30/2026

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: High

Score: 7.9

Percentile: 99.32

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2026-97631

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.5

Threat Score: 9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:edk2-aarch64, p-cpe:/a:amazon:linux:edk2-debuginfo, p-cpe:/a:amazon:linux:edk2-ovmf, p-cpe:/a:amazon:linux:edk2-tools-doc, p-cpe:/a:amazon:linux:edk2-tools

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/30/2026

Vulnerability Publication Date: 10/22/2026

Reference Information

CVE: CVE-2026-97631

Detections

Analytics