---
cve: "CVE-2025-5262"
severity: "HIGH"
cvss: 7.5
epss: "42%"
vendor: "Mozilla"
kev: false
exploited: false
published: "2025-05-27 13:15:21"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T20:45:21+02:00"
---

# CVE-2025-5262

> 7.5 HIGH

## Beschreibung

A double-free could have occurred in `vpx_codec_enc_init_multi` after a failed allocation when initializing the encoder for WebRTC. This could have caused memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 139 and Thunderbird < 128.11.

## CVSS-Vektor

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

## Referenzen

- <https://bugzilla.mozilla.org/show_bug.cgi?id=1962421>
- <https://www.mozilla.org/security/advisories/mfsa2025-45/>
- <https://www.mozilla.org/security/advisories/mfsa2025-46/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-5262) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_