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
- 68/100
Research direction
Start by inspecting the repository's Cargo dependency metadata to find how quinn-proto 0.11.14 is resolved. Update the dependency so the resolved version is at least 0.11.15, then run the existing Rust test suite and verify the lockfile no longer selects the vulnerable version.
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
- Stars
- 0
- Forks
- 2
- Avg merge
- 3d 24m
- Merged PRs (30d)
- 3
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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