CVE-2025-61684

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/19/2026

Last Modified2/27/2026

Sourcenvd

Honeypot Sightings0

Affected Products

h2o:quicly

Weaknesses (CWE)

CWE-20CWE-617

References

https://github.com/h2o/quicly/commit/d9d3df6a8530a102b57d840e39b0311ce5c9e14e(security-advisories@github.com)

https://github.com/h2o/quicly/security/advisories/GHSA-wr3c-345m-43v9(security-advisories@github.com)

IOC Correlations

No correlations recorded

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