CVE-2026-25800: CWE-770: Allocation of Resources Without Limits or Throttling in quinn-rs quinn
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.
AI Analysis
Technical Summary
CVE-2026-25800 describes a resource exhaustion vulnerability in the quinn-rs quinn library, a Rust implementation of the IETF QUIC protocol. Specifically, the Assembler component that reassembles unordered stream fragments into consecutive chunks suffers from overhead when processing non-contiguous fragments. If a peer sends fragments with many gaps, the receiver's buffer usage increases significantly, potentially causing memory exhaustion. This affects versions >=0.1.0 and <0.11.15. The vulnerability is addressed in version 0.11.15.
Potential Impact
The vulnerability can cause high memory consumption on the receiving side when processing fragmented streams with many gaps, leading to denial of service via memory exhaustion. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Upgrade to quinn version 0.11.15 or later, where this issue is fixed. No other official remediation or temporary fixes are documented. Patch status is confirmed by the version range and fix version stated.
CVE-2026-25800: CWE-770: Allocation of Resources Without Limits or Throttling in quinn-rs quinn
Description
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.
CVSS v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-25800 describes a resource exhaustion vulnerability in the quinn-rs quinn library, a Rust implementation of the IETF QUIC protocol. Specifically, the Assembler component that reassembles unordered stream fragments into consecutive chunks suffers from overhead when processing non-contiguous fragments. If a peer sends fragments with many gaps, the receiver's buffer usage increases significantly, potentially causing memory exhaustion. This affects versions >=0.1.0 and <0.11.15. The vulnerability is addressed in version 0.11.15.
Potential Impact
The vulnerability can cause high memory consumption on the receiving side when processing fragmented streams with many gaps, leading to denial of service via memory exhaustion. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Upgrade to quinn version 0.11.15 or later, where this issue is fixed. No other official remediation or temporary fixes are documented. Patch status is confirmed by the version range and fix version stated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-02-05T19:58:01.641Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a626a069c2644c7f89416cb
Added to database: 07/23/2026, 19:22:46 UTC
Last enriched: 07/23/2026, 20:51:57 UTC
Last updated: 09/03/2026, 10:52:08 UTC
Views: 96
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