---
cve: "CVE-2026-5745"
severity: "MEDIUM"
cvss: 5.5
epss: "16%"
vendor: "Red Hat"
kev: false
exploited: false
published: "2026-04-07 16:16:32"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-15T02:43:52+02:00"
---

# CVE-2026-5745

> 5.5 MEDIUM

## Beschreibung

A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archive_acl_from_text_nl() function. When processing a malformed ACL string (such as a bare "d" or "default" tag without subsequent fields), the function fails to perform adequate validation before advancing the pointer. An attacker can exploit this by providing a maliciously crafted archive, causing an application utilizing the libarchive API (such as bsdtar) to crash, resulting in a Denial of Service (DoS).

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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 | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

- <https://access.redhat.com/errata/RHSA-2026:8944>
- <https://access.redhat.com/security/cve/CVE-2026-5745>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2455921>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-5745) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_