VULNERABILITY INTELLIGENCE

CVE-2021-42390

CVSS score6.5 MEDIUM

EPSS probability1.26%

CISA KEVNot currently listed

Published2022-03-14

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

reefs@jfrog.com: CWE-369
nvd@nist.gov: CWE-369

Primary references

reefs@jfrog.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory