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Debian dla-4521 : libpng-dev - security update

high Nessus Plugin ID 304818

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4521 advisory.

 ------------------------------------------------------------------------- Debian LTS Advisory DLA-4521-1 [email protected] https://www.debian.org/lts/security/ Tobias Frost April 02, 2026 https://wiki.debian.org/LTS
 -------------------------------------------------------------------------

 Package : libpng1.6 Version : 1.6.37-3+deb11u3 CVE ID : CVE-2026-33416 CVE-2026-33636 Debian Bug : 1132012 1132013

 Two security vulnerabilities were discovered in libpng, a library implementing an interface for reading and writing PNG (Portable Network Graphics) files, which could result in denial of service or potentially the execution of arbitrary code.

 CVE-2026-33416

 Use-after-free via pointer aliasing in `png_set_tRNS` and `png_set_PLTE`, potentially allowing arbitrary code execution

 CVE-2026-33636

 Out-of-bounds read/write in the palette expansion on ARM Neon, potentially causing a crash (DoS)

 For Debian 11 bullseye, these problems have been fixed in version 1.6.37-3+deb11u3.

 We recommend that you upgrade your libpng1.6 packages.

 For the detailed security status of libpng1.6 please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/libpng1.6

 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
 signature.asc Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian 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

Upgrade the libpng-dev packages.

See Also

https://security-tracker.debian.org/tracker/source-package/libpng1.6

https://packages.debian.org/source/bullseye/libpng1.6

https://security-tracker.debian.org/tracker/CVE-2026-33636

https://security-tracker.debian.org/tracker/CVE-2026-33416

Plugin Details

Severity: High

ID: 304818

File Name: debian_DLA-4521.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/4/2026

Updated: 4/4/2026

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 7

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

CVSS Score Source: CVE-2026-33636

CVSS v3

Risk Factor: High

Base Score: 7.6

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:libpng-dev, p-cpe:/a:debian:debian_linux:libpng-tools, p-cpe:/a:debian:debian_linux:libpng16-16, p-cpe:/a:debian:debian_linux:libpng16-16-udeb

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/2/2026

Vulnerability Publication Date: 3/10/2026

Reference Information

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