Remote peer can panic quinn-proto with zero-length STREAM frames during unordered reads

{
  "id": "a4675152bc35768ace22cc931c6afbf7502d700d13756b74dadd4146d9a2cc17",
  "url": "https://osv.dev/vulnerability/RUSTSEC-2026-0338",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Remote peer can panic quinn-proto with zero-length STREAM frames during unordered reads",
    "summary": "When a stream is read in unordered mode (for example through `RecvStream::read(false)` in quinn-proto or `read_unordered` in `quinn`), quinn-proto proactively deduplicates received data by recording received ranges in a `RangeSet` through its `replace` method. When an incoming STREAM frame carried an empty payload, the `Drop` implementation of the iterator returned by `replace` inserted an empty range into the set, violating the invariant that stored ranges are non-empty. Subsequent frames overlapping that region then caused a panic while processing the stream. A remote peer can trigger this with five small STREAM frames (two of them zero-length) once the application has put the stream in unordered-read mode. The default ordered read path is not affected. The flaw was corrected in 0.11.18 by ignoring empty ranges in `RangeSet::replace`. Thanks to Otto Hermann ([@ojhermann](https://github.com/ojhermann)) for reporting this issue.",
    "evidence": "osv:RUSTSEC-2026-0338",
    "products": [
      {
        "name": {
          "value": "quinn-proto",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.11.18",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "RUSTSEC-2026-0338",
      "aliases": [
        "GHSA-465w-v9q3-7j98",
        "RUSTSEC-2026-0338"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0.7.0"
                },
                {
                  "fixed": "0.11.18"
                }
              ]
            }
          ],
          "package": {
            "name": "quinn-proto",
            "purl": "pkg:cargo/quinn-proto",
            "ecosystem": "crates.io"
          },
          "database_specific": {
            "cvss": null,
            "source": "https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0338.json",
            "categories": [
              "denial-of-service"
            ],
            "informational": null
          },
          "ecosystem_specific": {
            "affects": {
              "os": [],
              "arch": [],
              "functions": []
            },
            "affected_functions": null
          }
        }
      ],
      "modified": "2026-10-12T18:15:01.969514645Z",
      "provider": "osv",
      "references": [
        "https://crates.io/crates/quinn-proto",
        "https://rustsec.org/advisories/RUSTSEC-2026-0338.html",
        "https://github.com/quinn-rs/quinn/pull/2868"
      ],
      "provider_metadata": {
        "license": "CC0-1.0"
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 306471,
  "published_at": "2026-09-14T12:00:00+00:00"
}