CVE WatchJul 23, 2026

CVE-2026-25800

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.

CVSS

7.5

High

EPSS

0.3%

p26

KEV

—

Exploit Today

0-100

Published: Jul 23, 2026 · Last modified: Jul 23, 2026 · CWE-770

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-07-242026-07-26

Technical 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.

Official references

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