vLLM up to 0.8.4 Mooncake deserialization

Summaryinfo

A vulnerability labeled as very critical has been found in vLLM up to 0.8.4. Affected by this issue is some unknown functionality of the component Mooncake. The manipulation results in deserialization. This vulnerability is reported as CVE-2025-32444. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in vLLM up to 0.8.4. It has been classified as very critical. Affected is an unknown part of the component Mooncake. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

vLLM is a high-throughput and memory-efficient inference and serving engine for LLMs. Versions starting from 0.6.5 and prior to 0.8.5, having vLLM integration with mooncake, are vulnerable to remote code execution due to using pickle based serialization over unsecured ZeroMQ sockets. The vulnerable sockets were set to listen on all network interfaces, increasing the likelihood that an attacker is able to reach the vulnerable ZeroMQ sockets to carry out an attack. vLLM instances that do not make use of the mooncake integration are not vulnerable. This issue has been patched in version 0.8.5.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-32444 since 04/08/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/29/2025).

Upgrading to version 0.8.5 eliminates this vulnerability. Applying the patch a5450f11c95847cf51a17207af9a3ca5ab569b2c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• vLLM

Version

• 0.8.0
• 0.8.1
• 0.8.2
• 0.8.3
• 0.8.4

License

• open-source

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CPE 2.2info

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