CVE-2023-48298

Integer underflow leading to stack overflow in FPC codec decompression

5.9 Medium

ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time. This vulnerability is an integer underflow resulting in crash due to stack buffer overflow in decompression of FPC codec. It can be triggered and exploited by an unauthenticated attacker. The vulnerability is very similar to CVE-2023-47118 with how the vulnerable function can be exploited.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.63%Up 0.6 points since Dec 22, 2023

What each source reports

CVE List Score used 5.9

Integer underflow leading to stack overflow in FPC codec decompression

Record: CVE-2023-48298
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-191
Updated: 2026-11-02

EUVDEUVD-2023-52359 5.9

Record: EUVD-2023-52359
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-03

NVD 5.9

Record: CVE-2023-48298
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-191
Updated: 2026-11-02

OSV 5.9

Integer underflow leading to stack overflow in FPC codec decompression

Record: CVE-2023-48298
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-191
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-48298 5.9

Record: UBUNTU-CVE-2023-48298
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`clickhouse` Ubuntu:20.04:LTS	All versions, plus listed versions 18.16.1+ds-518.16.1+ds-5ubuntu118.16.1+ds-5ubuntu218.16.1+ds-6ubuntu118.16.1+ds-718.16.1+ds-7ubuntu0.1	None known
`clickhouse` Ubuntu:24.04:LTS	All versions, plus listed versions 18.16.1+ds-7.418.16.1+ds-7.4build118.16.1+ds-7.4build2	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-48298 is a medium vulnerability (CVSS 5.9) in Clickhouse, published December 21, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.63%, the 50th percentile. No source names a fixed version.