quic-go up to 0.56.x QUIC Protocol allocation of resources

Summaryinfo

A vulnerability described as problematic has been identified in quic-go up to 0.56.x. Affected by this vulnerability is an unknown functionality of the component QUIC Protocol Handler. Such manipulation leads to allocation of resources. This vulnerability is traded as CVE-2025-64702. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in quic-go up to 0.56.x and classified as problematic. Affected by this issue is an unknown code block of the component QUIC Protocol Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

quic-go is an implementation of the QUIC protocol in Go. Versions 0.56.0 and below are vulnerable to excessive memory allocation through quic-go's HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame that decodes into a large header field section (many unique header names and/or large values). The implementation builds an http.Header (used on the http.Request and http.Response, respectively), while only enforcing limits on the size of the (QPACK-compressed) HEADERS frame, but not on the decoded header, leading to memory exhaustion. This issue is fixed in version 0.57.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2025-64702 since 11/10/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 278506 (Linux Distros Unpatched Vulnerability : CVE-2025-64702), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.57.0 eliminates this vulnerability. Applying the patch 5b2d2129f8315da41e01eff0a847ab38a34e83a8 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.

The vulnerability is also documented in the vulnerability database at Tenable (278506). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• quic-go

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33
• 0.34
• 0.35
• 0.36
• 0.37
• 0.38
• 0.39
• 0.40
• 0.41
• 0.42
• 0.43
• 0.44
• 0.45
• 0.46
• 0.47
• 0.48
• 0.49
• 0.50
• 0.51
• 0.52
• 0.53
• 0.54
• 0.55
• 0.56

License

• open-source

Website

• Product: https://github.com/quic-go/quic-go/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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