CVE-2025-61684

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.5 / 10

Vector String

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

Vulnerability 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.

Vulnerability Details

Published Date

January 19, 2026

Last Modified

January 26, 2026

CWE ID

CWE-20

Source

NVD

Vendor

h2o

Product

quicly

External References

https://github.com/h2o/quicly/commit/d9d3df6a8530a102b57d840e39b0311ce5c9e14e
https://github.com/h2o/quicly/security/advisories/GHSA-wr3c-345m-43v9

CVE-2025-61684

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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