Amazon Linux 2023 : python3.14, python3.14-devel, python3.14-freethreading (ALAS2023-2026-1774)

medium Nessus Plugin ID 319867

Synopsis

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

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1774 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)

CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host. (CVE-2026-1502)

The profiling.sampling module (Python 3.15+) and asyncio introspection capabilities (3.14+, python -m asyncio ps and python -m asyncio pstree) features could be used to read and write addresses in a privileged process if that process connected to a malicious or infected Python process via the remote debugging feature. This vulnerability requires persistently and repeatedly connecting to the process to be exploited, even after the connecting process crashes with high likelihood due to ASLR. (CVE-2026-5713)

http.cookies.Morsel.js_output() returns an inline <script> snippet and only escapes for JavaScript string context. It does not neutralize the HTML parser-sensitive sequence </script> inside the generated script element. Mitigation base64-encodes the cookie value to disallow escaping using cookie value.
(CVE-2026-6019)

`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\\r\\n\\r\\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch. (CVE-2026-7210)

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 python3.14 --releasever 2023.12.20260608' or or 'dnf update --advisory ALAS2023-2026-1774 --releasever 2023.12.20260608' to update your system.

Plugin Details

Severity: Medium

ID: 319867

File Name: al2023_ALAS2023-2026-1774.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 6/8/2026

Updated: 6/8/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-7210

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: Medium

Base Score: 6.3

Threat Score: 2.9

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:python3.14-debug, p-cpe:/a:amazon:linux:python3.14-debuginfo, p-cpe:/a:amazon:linux:python3.14, p-cpe:/a:amazon:linux:python3.14-freethreading-debug, p-cpe:/a:amazon:linux:python3.14-freethreading-test, p-cpe:/a:amazon:linux:python3.14-debugsource, p-cpe:/a:amazon:linux:python3.14-freethreading, p-cpe:/a:amazon:linux:python3.14-freethreading-tkinter, p-cpe:/a:amazon:linux:python3.14-idle, p-cpe:/a:amazon:linux:python3.14-freethreading-idle, p-cpe:/a:amazon:linux:python3.14-tkinter, p-cpe:/a:amazon:linux:python3.14-freethreading-libs, p-cpe:/a:amazon:linux:python3.14-libs, p-cpe:/a:amazon:linux:python3.14-freethreading-devel, p-cpe:/a:amazon:linux:python3.14-test, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:python3.14-devel

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: 6/8/2026

Vulnerability Publication Date: 2/12/2026

Reference Information

CVE: CVE-2025-13462, CVE-2026-1502, CVE-2026-5713, CVE-2026-6019, CVE-2026-7210

IAVA: 2026-A-0142-S, 2026-A-0360

Detections

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