---
cve: "CVE-2026-66733"
severity: "HIGH"
cvss: 8.7
epss: "0.9%"
vendor: "Eukaryot"
kev: false
exploited: false
published: "2026-08-06 13:18:21"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T05:06:16+02:00"
---

# CVE-2026-66733

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Sonic 3 A.I.R. before commit 2492d18 contains an unbounded memory allocation vulnerability in ReceivedPacketCache::enqueuePacket() that allows unauthenticated remote attackers to crash the server process by sending a crafted UDP packet with mUniquePacketID set to the maximum uint32 value. The mUniquePacketID field is read directly from the UDP wire-format packet header without bounds checking, causing the server to allocate one CacheItem per missing packet ID gap, exhausting available host memory and propagating an uncaught std::bad_alloc exception to std::terminate().

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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 |

## Patch verfügbar (OSV)

- 2492d1882cd2cf1cc1d7415729ce5c4fd686cd4f (Commit)

## Referenzen

- <https://github.com/Eukaryot/sonic3air/commit/2492d1882cd2cf1cc1d7415729ce5c4fd686cd4f>
- <https://www.vulncheck.com/advisories/sonic-3-a-i-r-unbounded-memory-allocation-dos-via-receivedpacketcache>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-66733) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_