Resource exhaustion in Quinn-Rs Quinn
CVE-2026-25800
Quinn is a pure-Rust, async-compatible implementation of the IETF QUIC transport protocol. Starting in version 0.1.0 and prior to version 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. Version 0.11.15 fixes the issue.
EPSS: 0.006 (47.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Quinn-rs Quinn — versions >= 0.1.0, < 0.11.15
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-25800?
- CVE-2026-25800 is a high-severity vulnerability in Quinn-Rs Quinn, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-07-23.
- How severe is CVE-2026-25800?
- High severity. CVSS v3 base score is 7.5 out of 10.