CVE-2023-0950

Code execution via formula parameter underflow

Published May 25, 2023 · Updated Apr 23, 2025

Array-index underflow in LibreOffice Calc 7.4 before 7.4.6 and 7.5 before 7.5.1 allows attackers to execute code. ScInterpreter removes formula parameters from a stack without first ensuring that malformed formulas such as AGGREGATE supplied the expected count. Exploitation requires a user to load a crafted spreadsheet, after which code can execute in the LibreOffice process context.

CVSS severity7.8
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Array-index underflow in LibreOffice Calc 7.4 before 7.4.6 and 7.5 before 7.5.1 allows attackers to execute code. ScInterpreter removes formula parameters from a stack without first ensuring that malformed formulas such as AGGREGATE supplied the expected count. Exploitation requires a user to load a crafted spreadsheet, after which code can execute in the LibreOffice process context.

The record

CVE
CVE-2023-0950
Published
May 25, 2023
Updated
Apr 23, 2025
Vendor
The Document Foundation
Product
LibreOffice
Classifications
CWE-129, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.4 <7.4.6
  2. Affected versionversion=7.5 <7.5.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Document Foundation · LibreOfficeversion=7.4 <7.4.6; version=7.5 <7.5.1

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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