Linux Distros Unpatched Vulnerability : CVE-2026-66758

high Nessus Plugin ID 330229

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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.

- A flaw was found in the file-fits plugin in GIMP. When processing a FITS image file, the plugin calculates memory allocation sizes using signed 32-bit integers for width and height. If a crafted file sets both values to large values, their product exceeds 2^31 and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when cfitsio subsequently writes a full row of pixels in the buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service. (CVE-2026-66758)

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: 330229

File Name: unpatched_CVE_2026_66758.nasl

Version: 1.7

Type: Local

Agent: unix

Family: Misc.

Published: 7/27/2026

Updated: 9/2/2026

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: Medium

Score: 4.9

Percentile: 58.15

CVSS v2

Risk Factor: High

Base Score: 8.3

Temporal Score: 7.5

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

CVSS Score Source: CVE-2026-66758

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.4

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, cpe:/o:centos:centos:7, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:14.0, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:canonical:ubuntu_linux:gimp, p-cpe:/a:centos:centos:gimp-devel-tools, p-cpe:/a:centos:centos:gimp-devel, p-cpe:/a:centos:centos:gimp-help-browser, p-cpe:/a:centos:centos:gimp-libs, p-cpe:/a:centos:centos:gimp, p-cpe:/a:debian:debian_linux:gimp, p-cpe:/a:redhat:enterprise_linux:gimp-devel-tools, p-cpe:/a:redhat:enterprise_linux:gimp-devel, p-cpe:/a:redhat:enterprise_linux:gimp-help-browser, p-cpe:/a:redhat:enterprise_linux:gimp-libs, p-cpe:/a:redhat:enterprise_linux:gimp

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

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 7/27/2026

Reference Information

CVE: CVE-2026-66758

Detections

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