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Amazon Linux 2023 : libpng, libpng-devel, libpng-static (ALAS2023-2026-1463)

high Nessus Plugin ID 301356

Synopsis

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

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1463 advisory.

 libpng: An out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer.

 The images that trigger this vulnerability are valid per the PNG specification. (CVE-2026-25646)

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 'dnf update libpng --releasever 2023.10.20260302' or or 'dnf update --advisory ALAS2023-2026-1463 --releasever 2023.10.20260302' to update your system.

See Also

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

https://explore.alas.aws.amazon.com/CVE-2026-25646.html

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1463.html

Plugin Details

Severity: High

ID: 301356

File Name: al2023_ALAS2023-2026-1463.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/6/2026

Updated: 3/6/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 6

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

CVSS Score Source: CVE-2026-25646

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.3

Vector: CVSS:3.0/AV:N/AC:H/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: High

Base Score: 8.3

Threat Score: 7

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libpng-debuginfo, p-cpe:/a:amazon:linux:libpng, p-cpe:/a:amazon:linux:libpng-debugsource, p-cpe:/a:amazon:linux:libpng-static, p-cpe:/a:amazon:linux:libpng-tools, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:libpng-devel, p-cpe:/a:amazon:linux:libpng-tools-debuginfo, p-cpe:/a:amazon:linux:libpng-devel-debuginfo

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: 3/5/2026

Vulnerability Publication Date: 2/10/2026

Reference Information

CVE: CVE-2026-25646

IAVA: 2026-A-0135