Detections
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Linux Distros Unpatched Vulnerability : CVE-2026-23876

critical Nessus Plugin ID 293774

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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.

 - ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-13 and 6.9.13-38, a heap buffer overflow vulnerability in the XBM image decoder (ReadXBMImage) allows an attacker to write controlled data past the allocated heap buffer when processing a maliciously crafted image file. Any operation that reads or identifies an image can trigger the overflow, making it exploitable via common image upload and processing pipelines. Versions 7.1.2-13 and 6.9.13-38 fix the issue. (CVE-2026-23876)

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-2026-23876

https://ubuntu.com/security/CVE-2026-23876

Plugin Details

Severity: Critical

ID: 293774

File Name: unpatched_CVE_2026_23876.nasl

Version: 1.3

Type: local

Agent: unix

Family: Misc.

Published: 1/20/2026

Updated: 2/5/2026

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: Critical

Base Score: 10

Temporal Score: 9

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

CVSS Score Source: CVE-2026-23876

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.3

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:P/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:imagemagick, p-cpe:/a:centos:centos:imagemagick-c%2b%2b-devel, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:centos:centos:imagemagick-perl, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:redhat:enterprise_linux:imagemagick-perl, p-cpe:/a:centos:centos:imagemagick-devel, p-cpe:/a:redhat:enterprise_linux:imagemagick-c%2b%2b, p-cpe:/a:redhat:enterprise_linux:imagemagick, p-cpe:/a:redhat:enterprise_linux:imagemagick-c%2b%2b-devel, cpe:/o:centos:centos:7, p-cpe:/a:redhat:enterprise_linux:imagemagick-devel, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:imagemagick-doc, p-cpe:/a:centos:centos:imagemagick-doc, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, p-cpe:/a:centos:centos:imagemagick, p-cpe:/a:centos:centos:imagemagick-c%2b%2b

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

Exploit Available: true

Exploit Ease: Exploits are available

Reference Information

CVE: CVE-2026-23876