---
cve: "CVE-2026-19023"
severity: "MEDIUM"
cvss: 6.8
epss: "12%"
vendor: "The HDF Group"
kev: false
exploited: false
published: "2026-08-05 23:16:53"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T04:20:21+02:00"
---

# CVE-2026-19023

> 6.8 MEDIUM · 🧪 PoC

## Beschreibung

Untrusted pointer dereference in the render_bin_output function in the h5dump tool in HDF5 before 2.3.0 allows attackers to cause a denial of service via a variable-length string dataset with more than one element dumped in binary mode, which corrupts the per-element stride calculation and causes subsequent elements to be read from a misaligned offset and dereferenced as a pointer.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- 4fde4fd787744b6a19b12032f4dad0383fbe6fbd (Commit)

## Referenzen

- <https://github.com/HDFGroup/hdf5/issues/6486>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-19023) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_