---
cve: "CVE-2026-18649"
severity: "HIGH"
cvss: 7.5
epss: "1%"
vendor: "Red Hat"
kev: false
exploited: false
published: "2026-08-06 08:16:29"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T11:21:44+02:00"
---

# CVE-2026-18649

> 7.5 HIGH · 🧪 PoC

## Beschreibung

A flaw was found in the GStreamer gst-plugins-good package. The rtph264depay and rtph265depay RTP depayloader elements do not enforce a maximum size limit on the reassembly buffer used during fragmented RTP packet processing. A remote, unauthenticated attacker can send a continuous stream of RTP fragments without ever transmitting an end-of-fragment marker, causing the reassembly buffer to grow without bound until process memory is exhausted. This results in a denial of service through process termination.

## 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://0xsemizzz.vercel.app/projects/cve-2026-18649-gstreamer-rtp-dos/>
- <https://access.redhat.com/errata/RHSA-2026:53451>
- <https://access.redhat.com/errata/RHSA-2026:53452>
- <https://access.redhat.com/errata/RHSA-2026:56966>
- <https://access.redhat.com/errata/RHSA-2026:61588>
- <https://access.redhat.com/errata/RHSA-2026:61943>
- <https://access.redhat.com/errata/RHSA-2026:65959>
- <https://access.redhat.com/errata/RHSA-2026:65999>
- <https://access.redhat.com/errata/RHSA-2026:69232>
- <https://access.redhat.com/errata/RHSA-2026:70264>
- <https://access.redhat.com/errata/RHSA-2026:70584>
- <https://access.redhat.com/errata/RHSA-2026:70803>
- <https://access.redhat.com/security/cve/CVE-2026-18649>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2510614>
- <https://github.com/0xSemizzz/CVE-2026-18649>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-18649) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_