CVE-2026-66733: Memory Allocation with Excessive Size Value in Eukaryot sonic3air
CVE-2026-66733 is a high-severity vulnerability in Eukaryot sonic3air versions up to 26.03.28.0. It involves an unbounded memory allocation in the ReceivedPacketCache::enqueuePacket() function triggered by a crafted UDP packet with a maximum uint32 mUniquePacketID. This causes excessive memory allocation leading to server process crash due to uncaught exceptions.
AI Analysis
Technical Summary
The vulnerability in sonic3air before commit 2492d18 allows unauthenticated remote attackers to crash the server by sending a UDP packet with the mUniquePacketID field set to the maximum uint32 value. The server reads this field without bounds checking and allocates one CacheItem per missing packet ID gap, exhausting host memory and causing an uncaught std::bad_alloc exception that terminates the process.
Potential Impact
Successful exploitation results in denial of service by crashing the server process through memory exhaustion. This can disrupt availability of the affected sonic3air service. There is no indication of privilege escalation, data disclosure, or code execution from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, consider network-level filtering to block suspicious UDP packets with anomalous mUniquePacketID values.
CVE-2026-66733: Memory Allocation with Excessive Size Value in Eukaryot sonic3air
Description
CVE-2026-66733 is a high-severity vulnerability in Eukaryot sonic3air versions up to 26.03.28.0. It involves an unbounded memory allocation in the ReceivedPacketCache::enqueuePacket() function triggered by a crafted UDP packet with a maximum uint32 mUniquePacketID. This causes excessive memory allocation leading to server process crash due to uncaught exceptions.
CVSS v4.0
Score 8.7high
Affected software
Eukaryot
sonic3air
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in sonic3air before commit 2492d18 allows unauthenticated remote attackers to crash the server by sending a UDP packet with the mUniquePacketID field set to the maximum uint32 value. The server reads this field without bounds checking and allocates one CacheItem per missing packet ID gap, exhausting host memory and causing an uncaught std::bad_alloc exception that terminates the process.
Potential Impact
Successful exploitation results in denial of service by crashing the server process through memory exhaustion. This can disrupt availability of the affected sonic3air service. There is no indication of privilege escalation, data disclosure, or code execution from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, consider network-level filtering to block suspicious UDP packets with anomalous mUniquePacketID values.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-07-27T16:27:47.647Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a748820bf8831d539bf1b9f
Added to database: 08/06/2026, 13:12:00 UTC
Last enriched: 08/13/2026, 17:14:37 UTC
Last updated: 09/18/2026, 10:01:33 UTC
Views: 77
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