CVE-2023-48298 | Integer underflow leading to stack overflow in FPC codec decompression

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.

Published: 2023-12-21 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-48298 is rated Moderate Risk (45.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.47%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-48298

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.78% 0.47% -0.32%
2 2025-11-18 0.47% 0.78% +0.32%
3 2025-04-15 — 0.47% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-48298

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2023-48298

OS Trackers for CVE-2023-48298

vendor priority summary link
debian unimportant CVE-2023-48298 unimportant priority: Debian including 1 source packages (clickhouse), 2 status rows across 2 suites (bookworm, bullseye): resolved 2. https://security-tracker.debian.org/tracker/CVE-2023-48298
ubuntu medium CVE-2023-48298 medium priority: Ubuntu including 1 source packages (clickhouse), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 5, DNE 4, needs-triage 3. https://ubuntu.com/security/CVE-2023-48298

Affected software / configurations for CVE-2023-48298

Vendor Product Version Raw CPE
clickhouse clickhouse >= 23.3, <= 23.3.17.13 cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:*
clickhouse clickhouse >= 23.8, <= 23.8.7.24 cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:*
clickhouse clickhouse >= 23.9, <= 23.9.5.29 cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:*
clickhouse clickhouse >= 23.10, <= 23.10.4.25 cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:*
clickhouse clickhouse_cloud >= 23.9, <= 23.9.2.47475 cpe:2.3:a:clickhouse:clickhouse_cloud:*:*:*:*:*:*:*:*

References for CVE-2023-48298

cvelogic Threat Intelligence