---
cve: "CVE-2026-20911"
severity: "CRITICAL"
cvss: 9.8
epss: "0.6%"
vendor: "LibRaw"
kev: false
exploited: false
published: "2026-04-07 15:17:35"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-11-09T16:32:07+01:00"
---

# CVE-2026-20911

> 9.8 CRITICAL

## Beschreibung

A heap-based buffer overflow vulnerability exists in the HuffTable::initval functionality of LibRaw Commit 0b56545 and Commit d20315b. A specially crafted malicious file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

## CNA-Record (Kanon, cvelistV5)

- CNA: **talos**
- State: PUBLISHED
- Stand: 2026-07-15 01:20:09
- CNA-CVSS: **9.8** (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

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

| 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 | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-120** — Buffer Copy without Checking Size of Input
  The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
- **CWE-131** — Incorrect Calculation of Buffer Size
  The product does not correctly calculate the size to be used when allocating a buffer.

## Angriffsmuster (CAPEC)

- [CAPEC-10 — Buffer Overflow via Environment Variables](https://capec.mitre.org/data/definitions/10.html) _(Severity: High)_
- [CAPEC-14 — Client-side Injection-induced Buffer Overflow](https://capec.mitre.org/data/definitions/14.html) _(Severity: High)_
- [CAPEC-24 — Filter Failure through Buffer Overflow](https://capec.mitre.org/data/definitions/24.html) _(Severity: High)_
- [CAPEC-42 — MIME Conversion](https://capec.mitre.org/data/definitions/42.html) _(Severity: High)_
- [CAPEC-44 — Overflow Binary Resource File](https://capec.mitre.org/data/definitions/44.html) _(Severity: Very High)_
- [CAPEC-45 — Buffer Overflow via Symbolic Links](https://capec.mitre.org/data/definitions/45.html) _(Severity: High)_
- [CAPEC-46 — Overflow Variables and Tags](https://capec.mitre.org/data/definitions/46.html) _(Severity: High)_
- [CAPEC-100 — Overflow Buffers](https://capec.mitre.org/data/definitions/100.html) _(Severity: Very High)_

## Referenzen

- <https://talosintelligence.com/vulnerability_reports/TALOS-2026-2330>
- <https://www.talosintelligence.com/vulnerability_reports/TALOS-2026-2330>
- <https://access.redhat.com/security/cve/CVE-2026-20911>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2455959>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20911.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-20911/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_