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Findings

CVE-2026-25800

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

Published Jun 22, 2026 · updated Oct 12, 2026

The 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 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.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 22, 2026 · Catalog

    Detected

    The 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 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 s

  2. Oct 12, 2026 · Catalog

    Fix available

    crates.io quinn-proto 0.0.0-0 → 0.11.15

  3. Oct 12, 2026 · Catalog

    Updated

    The 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 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 s

Affected

  • crates.io quinn-proto0.0.0-0 → 0.11.15

Sources

References