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CVE-2026-66733— Sonic 3 A.I.R. Unbounded Memory Allocation DoS via ReceivedPacketCache

Quick assessment

Affected
Eukaryot sonic3air
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Eukaryot Sonic 3 A.I.R.是Eukaryot个人开发者的一款重制平台动作游戏。 Eukaryot Sonic 3 A.I.R commit 2492d18之前版本存在资源管理错误漏洞，该漏洞源于ReceivedPacketCache::enqueuePacket()函数存在无界内存分配问题，mUniquePacketID字段未经边界检查，未经身份验证的远程攻击者通过发送特制UDP数据包可导致服务器进程耗尽主机内存并崩溃，造成拒绝服务。

CVSS 7.5 · High EPSS 1.55% · P75

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
Eukaryot sonic3air ≤ 26.03.28.0 affected
2492d1882cd2cf1cc1d7415729ce5c4fd686cd4f unaffected
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I. Basic Information for CVE-2026-66733

Vulnerability Information
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Vulnerability Title
Sonic 3 A.I.R. Unbounded Memory Allocation DoS via ReceivedPacketCache
Source: CVE Program / CVE List V5
Vulnerability Description
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().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5
Vulnerability Title
Eukaryot Sonic 3 A.I.R 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Eukaryot Sonic 3 A.I.R.是Eukaryot个人开发者的一款重制平台动作游戏。 Eukaryot Sonic 3 A.I.R commit 2492d18之前版本存在资源管理错误漏洞，该漏洞源于ReceivedPacketCache::enqueuePacket()函数存在无界内存分配问题，mUniquePacketID字段未经边界检查，未经身份验证的远程攻击者通过发送特制UDP数据包可导致服务器进程耗尽主机内存并崩溃，造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eukaryot sonic3air 0 ~ 26.03.28.0 -

II. Public POCs for CVE-2026-66733

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8905 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-66733

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Patches & Fixes for CVE-2026-66733 (1)

Vendor Advisories for CVE-2026-66733 (1)

IV. Related Vulnerabilities

Same product: sonic3air
Same vendor: Eukaryot
Same weakness: CWE-789