Detections
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Linux Distros Unpatched Vulnerability : CVE-2026-4176

critical Nessus Plugin ID 304367

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib. Compress::Raw::Zlib is included in the Perl package as a dual-life core module, and is vulnerable to CVE-2026-3381 due to a vendored version of zlib which has several vulnerabilities, including CVE-2026-27171. The bundled Compress::Raw::Zlib was updated to version 2.221 in Perl blead commit c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94. (CVE-2026-4176)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-4176

https://ubuntu.com/security/CVE-2026-4176

Plugin Details

Severity: Critical

ID: 304367

File Name: unpatched_CVE_2026_4176.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 3/31/2026

Updated: 4/2/2026

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.4

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

CVSS Score Source: CVE-2026-4176

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9

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

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:perl-utils, p-cpe:/a:centos:centos:perl-devel, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:redhat:enterprise_linux:perl-devel, p-cpe:/a:centos:centos:perl-devel-peek, p-cpe:/a:centos:centos:perl-errno, p-cpe:/a:redhat:enterprise_linux:perl-devel-peek, p-cpe:/a:redhat:enterprise_linux:perl-extutils-miniperl, p-cpe:/a:centos:centos:perl-module-loaded, p-cpe:/a:centos:centos:perl-interpreter, p-cpe:/a:canonical:ubuntu_linux:perl, p-cpe:/a:redhat:enterprise_linux:perl-macros, p-cpe:/a:centos:centos:perl-net-ping, p-cpe:/a:redhat:enterprise_linux:perl-utils, p-cpe:/a:redhat:enterprise_linux:perl, p-cpe:/a:redhat:enterprise_linux:perl-open, p-cpe:/a:redhat:enterprise_linux:perl-selfloader, p-cpe:/a:redhat:enterprise_linux:perl-devel-selfstubber, p-cpe:/a:redhat:enterprise_linux:perl-tests, p-cpe:/a:centos:centos:perl-libnetcfg, p-cpe:/a:centos:centos:perl-test, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:perl-interpreter, p-cpe:/a:redhat:enterprise_linux:perl-extutils-embed, p-cpe:/a:redhat:enterprise_linux:perl-io, p-cpe:/a:centos:centos:perl-devel-selfstubber, p-cpe:/a:centos:centos:perl-extutils-miniperl, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:perl-memoize, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:redhat:enterprise_linux:perl-pod-html, p-cpe:/a:centos:centos:perl-memoize, p-cpe:/a:centos:centos:perl-locale-maketext-simple, p-cpe:/a:centos:centos:perl-io-zlib, p-cpe:/a:centos:centos:perl-attribute-handlers, p-cpe:/a:centos:centos:perl-open, p-cpe:/a:redhat:enterprise_linux:perl-time-piece, p-cpe:/a:redhat:enterprise_linux:perl-module-loaded, p-cpe:/a:centos:centos:perl-pod-html, p-cpe:/a:centos:centos:perl-io, p-cpe:/a:redhat:enterprise_linux:perl-libnetcfg, p-cpe:/a:redhat:enterprise_linux:perl-test, p-cpe:/a:redhat:enterprise_linux:perl-math-complex, p-cpe:/a:centos:centos:perl-math-complex, p-cpe:/a:centos:centos:perl-time-piece, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:centos:centos:perl-tests, p-cpe:/a:redhat:enterprise_linux:perl-io-zlib, p-cpe:/a:centos:centos:perl-extutils-embed, p-cpe:/a:redhat:enterprise_linux:perl-net-ping, p-cpe:/a:redhat:enterprise_linux:perl-libs, p-cpe:/a:centos:centos:perl-libs, p-cpe:/a:centos:centos:perl, p-cpe:/a:redhat:enterprise_linux:perl-errno, p-cpe:/a:redhat:enterprise_linux:perl-locale-maketext-simple, p-cpe:/a:redhat:enterprise_linux:perl-attribute-handlers, p-cpe:/a:centos:centos:perl-macros, p-cpe:/a:centos:centos:perl-selfloader

Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 3/29/2026

Reference Information

CVE: CVE-2026-4176