CVE-2024-45396: high-severity vulnerability in h2o quicly
Quicly assertion failures
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.6%
Quicly is an IETF QUIC protocol implementation. Quicly up to commtit d720707 is susceptible to a denial-of-service attack. A remote attacker can exploit these bugs to trigger an assertion failure that crashes process using quicly. The vulnerability is addressed with commit 2a95896104901589c495bc41460262e64ffcad5c.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
h2o · quiclyRelated CVEs — h2o quicly
In the same product, most dangerous first.
CVE-2026-44436HIGHQuicly is vulnerable to connection state corruptionEPSS 0.5%CVE-2026-44435HIGHQuicly: Remote Denial of Service via assertion failure when CRYPTO stream handshake data exceeds 32KBEPSS 0.5%CVE-2026-44433MEDIUMQuicly is vulnerable to memory exhaustionEPSS 0.5%CVE-2025-61684HIGHQuicly has assertion failuresEPSS 0.4%CVE-2026-44434MEDIUMQuicly is vulnerable to stateless reset injectionEPSS 0.2%