Detections
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RHEL 9 : libpng (RHSA-2026:3405)

high Nessus Plugin ID 300252

Synopsis

The remote Red Hat host is missing one or more security updates for libpng.

Description

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:3405 advisory.

 The libpng packages contain a library of functions for creating and manipulating Portable Network Graphics (PNG) image format files.

 Security Fix(es):

 * libpng: libpng: Information disclosure and denial of service via integer truncation in simplified write API (CVE-2026-22801)

 * libpng: libpng: Denial of service and information disclosure via heap buffer over-read in png_image_finish_read (CVE-2026-22695)

 * libpng: LIBPNG has a heap buffer overflow in png_set_quantize (CVE-2026-25646)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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

Update the RHEL libpng package based on the guidance in RHSA-2026:3405.

See Also

https://access.redhat.com/security/updates/classification/#important

https://bugzilla.redhat.com/show_bug.cgi?id=2428824

https://bugzilla.redhat.com/show_bug.cgi?id=2428825

https://bugzilla.redhat.com/show_bug.cgi?id=2438542

http://www.nessus.org/u?8c5ebe38

https://access.redhat.com/errata/RHSA-2026:3405

Plugin Details

Severity: High

ID: 300252

File Name: redhat-RHSA-2026-3405.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/2/2026

Updated: 3/2/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

Vendor

Vendor Severity: Important

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:redhat:enterprise_linux:libpng-devel, p-cpe:/a:redhat:enterprise_linux:libpng, cpe:/o:redhat:enterprise_linux:9

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/26/2026

Vulnerability Publication Date: 1/12/2026

Reference Information

CVE: CVE-2026-22695, CVE-2026-22801, CVE-2026-25646

CWE: 125

RHSA: 2026:3405