Detections
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Amazon Linux 2023 : gawk, gawk-all-langpacks, gawk-devel (ALAS2023-2026-2035)
medium Nessus Plugin ID 332012
Synopsis
The remote Amazon Linux 2023 host is missing a security update.Description
It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-2035 advisory.Use After Free vulnerability has been found in io.c program file of gawk (do_getline_redir() routine).
This issue may lead to a crash. It affects gawk in versions 5.4.0 and below. (CVE-2026-40467)
Integer overflow vulnerability has been found in builtin.c program file of gawk. This issue may lead to memory exhaustion on the hosting operating system and could be used to overwrite gawk heap metadata and objects with attacker-controlled bytes. It affects gawk in versions 5.4.0 and below. (CVE-2026-40468)
Buffer overflow vulnerability has been found in extension/readdir.c program file of gawk (ftype() routine). This issue could be used to crash the program and potentially to achieve code execution, although the latter has not been confirmed to be feasible. It affects gawk in versions 5.4.0 and below.
(CVE-2026-40553)
Tenable has extracted the preceding description block directly from the tested product security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Run 'dnf update gawk --releasever 2023.12.20260803' or or 'dnf update --advisory ALAS2023-2026-2035 --releasever 2023.12.20260803' to update your system.See Also
https://alas.aws.amazon.com//AL2023/ALAS2023-2026-2035.html
https://alas.aws.amazon.com/faqs.html
https://explore.alas.aws.amazon.com/CVE-2026-40467.html
Plugin Details
Severity: Medium
ID: 332012
File Name: al2023_ALAS2023-2026-2035.nasl
Version: 1.1
Type: Local
Agent: unix
Published: 8/4/2026
Updated: 8/4/2026
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.3
Percentile: 53.6
CVSS v2
Risk Factor: High
Base Score: 9.4
Temporal Score: 7
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:C
CVSS Score Source: CVE-2026-40468
CVSS v3
Risk Factor: Critical
Base Score: 9.1
Temporal Score: 7.9
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 5.1
Threat Score: 1.2
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:L
CVSS Score Source: CVE-2026-40553
Vulnerability Information
CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:gawk-all-langpacks, p-cpe:/a:amazon:linux:gawk-debuginfo, p-cpe:/a:amazon:linux:gawk-debugsource, p-cpe:/a:amazon:linux:gawk-devel, p-cpe:/a:amazon:linux:gawk-doc, p-cpe:/a:amazon:linux:gawk
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 8/4/2026
Vulnerability Publication Date: 7/13/2026