---
cve: "CVE-2026-19024"
severity: "HIGH"
cvss: 8.2
epss: "13%"
vendor: "The HDF Group"
kev: false
exploited: false
published: "2026-08-05 23:16:53"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T17:30:35+02:00"
---

# CVE-2026-19024

> 8.2 HIGH · 🧪 PoC

## Beschreibung

NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.3.0 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the "defined" flag set together with a negative size field, which is not normalized to the library's "undefined" sentinel and reaches H5T_path_find with a NULL datatype.

## 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:H
```

| 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/6487>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-19024) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_