CVE-2025-24947 Information

Description

A hash collision vulnerability (in the hash table used to manage connections) in LSQUIC (aka LiteSpeed QUIC) before 4.2.0 allows remote attackers to cause a considerable CPU load on the server (a Hash DoS attack) by initiating connections with colliding Source Connection IDs (SCIDs). This is caused by XXH32 usage.

Reference

https://github.com/litespeedtech/lsquic/releases/tag/v4.2.0 https://github.com/ncc-pbottine/QUIC-Hash-Dos-Advisory https://xxhash.com