GHSA-4w2j-m93h-cj5j

Quinn: Remote memory exhaustion in quinn-proto from unbounded out-of-order stream reassembly

Published

2026-07-24

Modified

2026-07-24

Sources

github-advisory

Summary

## Summary 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.

Affected packages

Remediation: Upgrade to 0.11.15 or later.

References

• https://github.com/advisories/GHSA-4w2j-m93h-cj5j