Detections
Analytics

Linux Distros Unpatched Vulnerability : CVE-2025-66293

high Nessus Plugin ID 277411

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.52, an out-of-bounds read vulnerability in libpng's simplified API allows reading up to 1012 bytes beyond the png_sRGB_base[512] array when processing valid palette PNG images with partial transparency and gamma correction. The PNG files that trigger this vulnerability are valid per the PNG specification; the bug is in libpng's internal state management.
 Upgrade to libpng 1.6.52 or later. (CVE-2025-66293)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2025-66293

https://ubuntu.com/security/CVE-2025-66293

Plugin Details

Severity: High

ID: 277411

File Name: unpatched_CVE_2025_66293.nasl

Version: 1.27

Type: Local

Agent: unix

Family: Misc.

Published: 12/4/2025

Updated: 7/28/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 52.04

CVSS v2

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5.2

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

CVSS Score Source: CVE-2025-66293

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:25.04, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:canonical:ubuntu_linux:libpng1.6, p-cpe:/a:canonical:ubuntu_linux:thunderbird, p-cpe:/a:redhat:enterprise_linux:libpng-devel, p-cpe:/a:redhat:enterprise_linux:libpng-static, p-cpe:/a:redhat:enterprise_linux:libpng

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 12/3/2025

Reference Information

CVE: CVE-2025-66293