CVE catalog
CVE-2021-42391
clickhouse: CVE-2021-42391
- Severity
- Low
- Source
- [NVD] · [CVE record]
- EPSS
- 1.37% · Oct 25, 2026
Divide-by-zero in Clickhouse's Gorilla 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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | clickhouse | bookworm | 18.16.1+ds-7.3 | not affected |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | clickhouse | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [clickhouse-client]Not affected
Source package: [clickhouse]
Details (2)
18.16.1+ds-7.3+b2· amd64 · bookwormNot affected
dsa · clickhouse · debian · bookworm
18.16.1+ds-7.3+b2· arm64 · bookwormNot affected
dsa · clickhouse · debian · bookworm
- [clickhouse-common]Not affected
Source package: [clickhouse]
Details (2)
18.16.1+ds-7.3+b2· amd64 · bookwormNot affected
dsa · clickhouse · debian · bookworm
18.16.1+ds-7.3+b2· arm64 · bookwormNot affected
dsa · clickhouse · debian · bookworm
- [clickhouse-server]Not affected
Source package: [clickhouse]
Details (2)
18.16.1+ds-7.3+b2· amd64 · bookwormNot affected
dsa · clickhouse · debian · bookworm
18.16.1+ds-7.3+b2· arm64 · bookwormNot affected
dsa · clickhouse · debian · bookworm
- [clickhouse-tools]Not affected
Source package: [clickhouse]
Details (2)
18.16.1+ds-7.3+b2· amd64 · bookwormNot affected
dsa · clickhouse · debian · bookworm
18.16.1+ds-7.3+b2· arm64 · bookwormNot affected
dsa · clickhouse · debian · bookworm
Observed: