Fedora 43 : libpng (2026-a109a9ac2c)

medium Nessus Plugin ID 318196

Synopsis

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

Description

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-a109a9ac2c advisory.

* updated to 1.6.58
* 1.6.58 is released with a fix for a simple correctness bug (not a security issue) this time:
png_get_PLTE() returns stale palette data when either gamma correction or alpha-compositing is the only transform applied. Like the issues addressed in the previous release, this bug was a regression introduced in the fix for CVE-2026-33416 in 1.6.56.
* 1.6.57 is released with fixes for the following security vulnerability:
- CVE-2026-34757 (medium severity): Use-after-free memory bug in the chunk setter API. The hIST variant has existed since version 1.0.9, but the PLTE and tRNS ones are regressions introduced in the fix for CVE-2026-33416 in 1.6.56 (oops).

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.

Plugin Details

Severity: Medium

ID: 318196

File Name: fedora_2026-a109a9ac2c.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Fedora Local Security Checks

Published: 6/2/2026

Updated: 6/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Low

Base Score: 3.2

Temporal Score: 2.5

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

CVSS Score Source: CVE-2026-34757

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 4

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

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

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:libpng, cpe:/o:fedoraproject:fedora:43

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: 5/26/2026

Vulnerability Publication Date: 3/10/2026

Reference Information

CVE: CVE-2026-22020, CVE-2026-33416, CVE-2026-34757

FEDORA: 2026-a109a9ac2c

IAVA: 2026-A-0272-S, 2026-A-0322

Detections

Analytics