CVE catalog
CVE-2021-42389
clickhouse affected and fixed versions
Divide-by-zero in Clickhouse's Delta 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.
- Severity
- Low
- Source
- [NVD] · [CVE record]
- EPSS
- 1.26% · Oct 27, 2026
Projects and upstream resources
Reported versions and fixes
Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.
| Distribution / release | Package | Version | Status | Source |
|---|---|---|---|---|
| Debianbookworm | clickhouse | Not reported | Not affectedDistribution reports not affected | [CVE-2021-42389] |
| Debianbookworm | clickhouse | 18.16.1+ds-7.3 | Not affected | [CVE-2021-42389] |
Provider details and historical evidence
| Distribution / release | Package | Version | Status | Source |
|---|---|---|---|---|
| Debianbookworm | clickhouse | Not reported | Not affectedDistribution reports not affected | [CVE-2021-42389] |
| Debianbookworm | clickhouse | 18.16.1+ds-7.3 | Not affected | [CVE-2021-42389] |
Original provider fields
{
"package_releases": [
{
"name": "clickhouse",
"status": "not affected",
"release": "bookworm",
"version": "18.16.1+ds-7.3"
}
],
"fixed_versions": [
{
"bug": null,
"name": "clickhouse",
"type": "source",
"origin": null,
"release": "bookworm",
"urgency": "unimportant",
"fixed_version": "0"
}
],
"distribution_packages": []
}OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [clickhouse-client]Unknown
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]Unknown
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]Unknown
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]Unknown
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: