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Debian dla-4481 : libpng-dev - security update

high Nessus Plugin ID 299340

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-4481 advisory.

 ------------------------------------------------------------------------- Debian LTS Advisory DLA-4481-1 [email protected] https://www.debian.org/lts/security/ Tobias Frost February 17, 2026 https://wiki.debian.org/LTS
 -------------------------------------------------------------------------

 Package : libpng1.6 Version : 1.6.37-3+deb11u2 CVE ID : CVE-2026-22695 CVE-2026-22801 CVE-2026-25646 Debian Bug : 1125443 1125444 1127566

 Multiple vulnerabilties have been found in libpng, the official PNG reference library, allowing information disclosure via out-of-bounds read, denial of service via infinite loop.

 CVE-2026-22695

 There is a heap buffer over-read in the libpng simplified API function png_image_finish_read when processing interlaced 16-bit PNGs with 8-bit output format and non-minimal row stride. This is a regression introduced by the fix for CVE-2025-65018.

 CVE-2026-22801

 There is an integer truncation in the libpng simplified write API functions png_write_image_16bit and png_write_image_8bit causes heap buffer over-read when the caller provides a negative row stride (for bottom-up image layouts) or a stride exceeding 65535 bytes. The bug was introduced in libpng 1.6.26 (October 2016) by casts added to silence compiler warnings on 16-bit systems.

 CVE-2026-25646

 A out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer. The images that trigger this vulnerability are valid per the PNG specification.

 For Debian 11 bullseye, these problems have been fixed in version 1.6.37-3+deb11u2.

 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://security-tracker.debian.org/tracker/CVE-2025-65018

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

https://security-tracker.debian.org/tracker/CVE-2026-22695

https://security-tracker.debian.org/tracker/CVE-2026-22801

https://security-tracker.debian.org/tracker/CVE-2026-25646

Plugin Details

Severity: High

ID: 299340

File Name: debian_DLA-4481.nasl

Version: 1.1

Type: local

Agent: unix

Published: 2/17/2026

Updated: 2/17/2026

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

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: 2/17/2026

Vulnerability Publication Date: 11/11/2025

Reference Information

CVE: CVE-2025-65018, CVE-2026-22695, CVE-2026-22801, CVE-2026-25646