RUSTSEC-2026-0185: Remote memory exhaustion in quinn-proto from unbounded out-of-order stream reassembly

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
70/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
rust
Domain
security

Research direction

Start by reviewing the quinn-proto 0.11.14 dependency and the linked upstream pull request, then check the RUSTSEC-2026-0185 advisory for the affected behavior. Done means graph-node resolves quinn-proto at version 0.11.15 or newer and the dependency update is verified without introducing regressions.

Written by the indexing model from the issue text.

Description

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

Details
Package quinn-proto
Version 0.11.14
URL https://github.com/quinn-rs/quinn/pull/2694
Date 2026-06-22
Patched versions >=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.

See advisory page for additional details.

Dominant language
Rust
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