Detections
Analytics

Fedora 42 : libpng (2026-ba18a54554)

high Nessus Plugin ID 306604

Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-ba18a54554 advisory.

 1.6.56 is release fixes for the following two security vulnerabilities:

 - CVE-2026-33416 (high severity): Use-after-free memory bug in the transparency and palette-handling code.
 Similar to its predecessor CVE-2026-25646, this latent bug has existed for 25 years. Both Halil Oktay and Ryo Shimada discovered it within days of one another.

 - CVE-2026-33636 (high severity): Out-of-bounds read and write vulnerability in the ARM Neon palette- expansion code. This one was found and fixed by Taegu Ha and has existed since 1.6.36.

 The images that trigger these bugs are valid. Users are encouraged to update immediately.

Tenable has extracted the preceding description block directly from the Fedora 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 affected 2:libpng package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-ba18a54554

Plugin Details

Severity: High

ID: 306604

File Name: fedora_2026-ba18a54554.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/16/2026

Updated: 4/16/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

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:fedoraproject:fedora:libpng, cpe:/o:fedoraproject:fedora:42

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/7/2026

Vulnerability Publication Date: 2/10/2026

Reference Information

CVE: CVE-2026-25646, CVE-2026-33416, CVE-2026-33636

FEDORA: 2026-ba18a54554

IAVA: 2026-A-0135-S, 2026-A-0272