CVE-2026-66733: Sonic 3 A.I.R. Unbounded Memory Allocation DoS via ReceivedPacketCache
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::badalloc exception to std::terminate().
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-66733?
The severity of CVE-2026-66733 is high, with a CVSS score of 7.5.
How do I fix CVE-2026-66733?
To fix CVE-2026-66733, upgrade Sonic 3 A.I.R. to the version after commit 2492d18.
What type of vulnerability is CVE-2026-66733?
CVE-2026-66733 is an unbounded memory allocation vulnerability that can lead to a denial-of-service condition.
Who is affected by CVE-2026-66733?
Any server running a vulnerable version of Sonic 3 A.I.R. prior to commit 2492d18 is affected by CVE-2026-66733.
What attack vector is used in CVE-2026-66733?
CVE-2026-66733 allows unauthenticated remote attackers to exploit the vulnerability by sending a crafted UDP packet.