Detections
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Amazon Linux 2023 : python3.13, python3.13-devel, python3.13-freethreading (ALAS2023-2026-1964)

high Nessus Plugin ID 328491

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1964 advisory.

 The tarfile module would still apply normalization of AREGTYPE (\x00) blocks to DIRTYPE, even while processing a multi-block member such as GNUTYPE_LONGNAME or GNUTYPE_LONGLINK. This could result in a crafted tar archive being misinterpreted by the tarfile module compared to other implementations.
 (CVE-2025-13462)

 When using the configparser module to write configuration filescontaining multi-line text values with carriage return characters (\r) theresulting file could be injected with unexpected keys and values if theattacker controls the written value. (CVE-2026-0864)

 When using the tarfile module with a file opened in streaming mode (mode=r|) the tarfile module did not properly handle EOF, making archive parsing take exponentially longer. (CVE-2026-11972)

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 python3.13 --releasever 2023.12.20260720' or or 'dnf update --advisory ALAS2023-2026-1964 --releasever 2023.12.20260720' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1964.html

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2025-13462.html

https://explore.alas.aws.amazon.com/CVE-2026-0864.html

https://explore.alas.aws.amazon.com/CVE-2026-11972.html

Plugin Details

Severity: High

ID: 328491

File Name: al2023_ALAS2023-2026-1964.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 7/20/2026

Updated: 7/20/2026

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: 4.3

Percentile: 53.67

CVSS v2

Risk Factor: Low

Base Score: 1.7

Temporal Score: 1.3

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

CVSS Score Source: CVE-2025-13462

CVSS v3

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.9

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

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

CVSS v4

Risk Factor: High

Base Score: 8.2

Threat Score: 4.6

Threat Vector: CVSS:4.0/E:U

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

CVSS Score Source: CVE-2026-11972

Vulnerability Information

CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:python3.13-debug, p-cpe:/a:amazon:linux:python3.13-debuginfo, p-cpe:/a:amazon:linux:python3.13-debugsource, p-cpe:/a:amazon:linux:python3.13-devel, p-cpe:/a:amazon:linux:python3.13-freethreading-debug, p-cpe:/a:amazon:linux:python3.13-freethreading, p-cpe:/a:amazon:linux:python3.13-idle, p-cpe:/a:amazon:linux:python3.13-libs, p-cpe:/a:amazon:linux:python3.13-test, p-cpe:/a:amazon:linux:python3.13-tkinter, p-cpe:/a:amazon:linux:python3.13

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: 2/12/2026

Reference Information

CVE: CVE-2025-13462, CVE-2026-0864, CVE-2026-11972

IAVA: 2026-A-0142-S