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Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: libpng (UTSA-2025-991300)

medium Nessus Plugin ID 279466

Synopsis

The Unity Linux host is missing one or more security updates.

Description

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-991300 advisory.

 LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_do_quantize function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of- bounds memory access. This issue has been patched in version 1.6.51.

Tenable has extracted the preceding description block directly from the Unity Linux 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

Update the affected libpng package.

See Also

http://www.nessus.org/u?f546dfbb

https://access.redhat.com/security/cve/CVE-2025-64505

https://nvd.nist.gov/vuln/detail/CVE-2025-64505

Plugin Details

Severity: Medium

ID: 279466

File Name: unity_linux_UTSA-2025-991300.nasl

Version: 1.1

Type: local

Published: 12/20/2025

Updated: 12/20/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.1

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

CVSS Score Source: CVE-2025-64505

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

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

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/UOS-Server/release, Host/UOS-Server/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 12/20/2025

Vulnerability Publication Date: 11/24/2025

Reference Information

CVE: CVE-2025-64505