Quicly has assertion failures_CVE-2025-61684

7.5 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

Quicly, an IETF QUIC protocol implementation, is susceptible to a denial-of-service attack prior to commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e. A remote attacker can exploit these bugs to trigger an assertion failure that crashes process using Quicly. Commit d9d3df6a8530a102b57d840e39b0311ce5c9e14e fixes the issue.

Basic Information

ID CVE-2025-61684

Source GitHub_M

Published Jan 19, 2026 at 15:18

Affected Product

Vendor h2o

Product quicly

Version < d9d3df6

Affected Versions h2o quicly < d9d3df6

CWE Classification

CWE-20

References

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    "published": "2026-01-19T15:18:11.398Z",
    "modified": "2026-01-19T15:18:11.398Z",
    "type": "cve",
    "title": "Quicly has assertion failures",
    "source": "GitHub_M",
    "references": "https://github.com/h2o/quicly/security/advisories/GHSA-wr3c-345m-43v9\nhttps://github.com/h2o/quicly/commit/d9d3df6a8530a102b57d840e39b0311ce5c9e14e",
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