What is CVE-2024-41436?

CVE-2024-41436 is a high-severity vulnerability in Clickhouse, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2024-09-03.

How severe is CVE-2024-41436?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2024-41436 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Clickhouse

CVE-2024-41436

ClickHouse v24.3.3.102 was discovered to contain a buffer overflow via the component DB::evaluateConstantExpressionImpl.

Vulnerability class: Buffer Overflow

Published 2024-09-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (44.4th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Clickhouse — versions 24.3.3.102

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

References

github.com/ClickHouse/ClickHouse/issues/65520 (Exploit, Issue Tracking)
gist.github.com/ycybfhb/db127ae9d105a4d20edc9f010a959016 (Third Party Advisory)

Frequently asked questions

What is CVE-2024-41436?: CVE-2024-41436 is a high-severity vulnerability in Clickhouse, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2024-09-03.
How severe is CVE-2024-41436?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2024-41436 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.