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cve/2021/CVE-2021-42390.md
0xMarcio cb00e1339f Update CVE list 2025-09-29 21:09
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CVE-2021-42390

Description

Divide-by-zero in Clickhouse's DeltaDouble compression codec when parsing a malicious query. The first byte of the compressed buffer is used in a modulo operation without being checked for 0.

POC

Reference

Github

No PoCs found on GitHub currently.