Linux Distros Unpatched Vulnerability : CVE-2026-4046

high Nessus Plugin ID 304363

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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.

- The iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure when converting inputs from the IBM1390 or IBM1399 character sets, which may be used to remotely crash an application. This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character sets from systems that do not need them. (CVE-2026-4046)

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

Solution

There is no known solution at this time.

Plugin Details

Severity: High

ID: 304363

File Name: unpatched_CVE_2026_4046.nasl

Version: 1.8

Type: Local

Agent: unix

Family: Misc.

Published: 3/31/2026

Updated: 5/26/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.5

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

CVSS Score Source: CVE-2026-4046

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:glibc-common, p-cpe:/a:centos:centos:glibc-headers, p-cpe:/a:redhat:enterprise_linux:glibc-devel, p-cpe:/a:centos:centos:glibc-devel, p-cpe:/a:centos:centos:glibc-static, p-cpe:/a:centos:centos:glibc-common, p-cpe:/a:centos:centos:compat-glibc, p-cpe:/a:canonical:ubuntu_linux:eglibc, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:redhat:enterprise_linux:glibc-utils, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:centos:centos:glibc, p-cpe:/a:debian:debian_linux:glibc, p-cpe:/a:redhat:enterprise_linux:compat-glibc-headers, p-cpe:/a:redhat:enterprise_linux:compat-glibc, p-cpe:/a:centos:centos:compat-glibc-headers, p-cpe:/a:redhat:enterprise_linux:glibc, p-cpe:/a:centos:centos:nscd, p-cpe:/a:canonical:ubuntu_linux:glibc, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:glibc-headers, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:glibc-static, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:centos:centos:glibc-utils, p-cpe:/a:redhat:enterprise_linux:nscd

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

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 3/30/2026

Reference Information

CVE: CVE-2026-4046

Detections

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