CVE-2024-1765: Unlimited resource allocation by QUIC CRYPTO frames flooding in quiche

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-03-12 · updated 2026-06-17
Weakness: CWE-400

Description

Cloudflare Quiche (through version 0.19.1/0.20.0) was affected by an unlimited resource allocation vulnerability causing rapid increase of memory usage of the system running quiche server or client. A remote attacker could take advantage of this vulnerability by repeatedly sending an unlimited number of 1-RTT CRYPTO frames after previously completing the QUIC handshake. Exploitation was possible for the duration of the connection which could be extended by the attacker. quiche 0.19.2 and 0.20.1 are the earliest versions containing the fix for this issue.

Affected products

Cloudflare quiche: before 0.19.2; 0.20.0 — fixed in 0.19.2

How to fix

Upgrade to a fixed version: Cloudflare quiche 0.19.2. Check the vendor advisory for mitigations.

References

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