---
cve: "CVE-2026-66758"
severity: "HIGH"
cvss: 7.8
epss: "25%"
vendor: "Red Hat"
kev: false
exploited: false
published: "2026-07-27 19:07:12"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T09:14:00+02:00"
---

# CVE-2026-66758

> 7.8 HIGH

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

- <https://access.redhat.com/errata/RHSA-2026:50817>
- <https://access.redhat.com/security/cve/CVE-2026-66758>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2507475>
- <https://gitlab.gnome.org/GNOME/gimp/-/issues/16528>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-66758) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_