CVE-2025-61684

HIGH

Quicly <d9d3df6a8530- DoS

Title source: llm
STIX 2.1

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.

Scores

CVSS v3 7.5
EPSS 0.0021
EPSS Percentile 43.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-617 CWE-20
Status published
Products (1)
h2o/quicly < 2026-01-18
Published Jan 19, 2026
Tracked Since Feb 18, 2026