---
cve: "CVE-2026-5121"
severity: "HIGH"
cvss: 7.5
epss: "1.1%"
vendor: "Red Hat"
kev: false
exploited: false
published: "2026-03-30 08:16:18"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-05T17:52:58+02:00"
---

# CVE-2026-5121

> 7.5 HIGH · 🧪 PoC

## Beschreibung

A flaw was found in libarchive. On 32-bit systems, an integer overflow vulnerability exists in the zisofs block pointer allocation logic. A remote attacker can exploit this by providing a specially crafted ISO9660 image, which can lead to a heap buffer overflow. This could potentially allow for arbitrary code execution on the affected system.

## CVSS-Vektor

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

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

## Referenzen

- <https://access.redhat.com/errata/RHSA-2026:10065>
- <https://access.redhat.com/errata/RHSA-2026:10097>
- <https://access.redhat.com/errata/RHSA-2026:11768>
- <https://access.redhat.com/errata/RHSA-2026:12071>
- <https://access.redhat.com/errata/RHSA-2026:12274>
- <https://access.redhat.com/errata/RHSA-2026:13812>
- <https://access.redhat.com/errata/RHSA-2026:14773>
- <https://access.redhat.com/errata/RHSA-2026:14937>
- <https://access.redhat.com/errata/RHSA-2026:15087>
- <https://access.redhat.com/errata/RHSA-2026:16008>
- <https://access.redhat.com/errata/RHSA-2026:16009>
- <https://access.redhat.com/errata/RHSA-2026:16030>
- <https://access.redhat.com/errata/RHSA-2026:16174>
- <https://access.redhat.com/errata/RHSA-2026:17596>
- <https://access.redhat.com/errata/RHSA-2026:19724>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-5121) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_