Detections
Analytics

Linux Distros Unpatched Vulnerability : CVE-2026-86421

medium Nessus Plugin ID 343544

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.

 - ImageMagick before 7.1.2-30 and 6.9.13-55 contains a memory leak in the MSL image decoder. A crafted MSL image triggers memory allocation without proper deallocation, allowing an attacker to exhaust memory and cause a denial of service. (CVE-2026-86421)

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-2026-86421

https://security-tracker.debian.org/tracker/CVE-2026-86421

Plugin Details

Severity: Medium

ID: 343544

File Name: unpatched_CVE_2026_86421.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Misc.

Published: 9/7/2026

Updated: 9/8/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.2

Percentile: 50.58

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-86421

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.4

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 1.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:centos:centos:7, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:imagemagick-c%2b%2b-devel, p-cpe:/a:centos:centos:imagemagick-c%2b%2b, p-cpe:/a:centos:centos:imagemagick-devel, p-cpe:/a:centos:centos:imagemagick-doc, p-cpe:/a:centos:centos:imagemagick-perl, p-cpe:/a:centos:centos:imagemagick, p-cpe:/a:debian:debian_linux:imagemagick, p-cpe:/a:redhat:enterprise_linux:imagemagick-c%2b%2b-devel, p-cpe:/a:redhat:enterprise_linux:imagemagick-c%2b%2b, p-cpe:/a:redhat:enterprise_linux:imagemagick-devel, p-cpe:/a:redhat:enterprise_linux:imagemagick-doc, p-cpe:/a:redhat:enterprise_linux:imagemagick-perl, p-cpe:/a:redhat:enterprise_linux:imagemagick

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

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/7/2026

Reference Information

CVE: CVE-2026-86421