quinn-rs quinn up to 0.11.14 Assembler memory allocation

Summaryinfo

A vulnerability, which was classified as problematic, was found in quinn-rs quinn up to 0.11.14. Affected by this issue is some unknown functionality of the component Assembler. Such manipulation leads to memory allocation. This vulnerability is referenced as CVE-2026-25800. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in quinn-rs quinn up to 0.11.14. Affected by this issue is some unknown functionality of the component Assembler. The manipulation with an unknown input leads to a memory allocation vulnerability. Using CWE to declare the problem leads to CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. Impacted is availability. CVE summarizes:

Quinn is a pure-Rust, async-compatible implementation of the IETF QUIC transport protocol. Starting in version 0.1.0 and prior to version 0.11.15, the `Assembler` component that assembles unordered stream fragments into consecutive chunks of the stream incurs some overhead for non-contiguous fragments. Readers that read from a `RecvStream` in order (through an `AsyncRead` impl for example) will be sensitive to peers that send fragments while leaving out early parts of the stream, and in particular, fragments with many gaps (because these cannot be defragmented). In such a scenario, the receiving connection suffers from high buffer overhead, enabling memory exhaustion. Version 0.11.15 fixes the issue.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-25800 since 02/05/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available.

Upgrading to version 0.11.15 eliminates this vulnerability.

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Productinfo

Vendor

• quinn-rs

Name

• quinn

Version

• 0.11.0
• 0.11.1
• 0.11.2
• 0.11.3
• 0.11.4
• 0.11.5
• 0.11.6
• 0.11.7
• 0.11.8
• 0.11.9
• 0.11.10
• 0.11.11
• 0.11.12
• 0.11.13
• 0.11.14

Website

• Product: https://github.com/quinn-rs/quinn/

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