---
cve: "CVE-2020-37239"
severity: "CRITICAL"
cvss: 9.3
epss: "46%"
vendor: "Gegl"
kev: false
exploited: false
published: "2026-05-16 16:16:20"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-05T18:42:38+02:00"
---

# CVE-2020-37239

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

libbabl 0.1.62 contains a broken double free detection vulnerability that allows attackers to bypass memory safety checks by exploiting signature overwriting in freed chunks. Attackers can call babl_free() twice on the same pointer without triggering detection, as libc's malloc metadata overwrites babl's signature field upon freeing, enabling potential memory corruption and code execution.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://www.exploit-db.com/exploits/49259>
- <https://www.gegl.org>
- <https://www.gegl.org/babl/>
- <https://www.vulncheck.com/advisories/libbabl-broken-double-free-detection-memory-safety>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2020-37239) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_