CVE-2026-6040

HIGH

Heap use-after-free in ODF number-format blank-width parsing

Title source: cna
STIX 2.1

Description

A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the document was not checked against the length of the format-code string, so a malformed number format could be processed against memory outside that string. In fixed versions the position is bounds-checked before use.

References (4)

Core 4

Scores

CVSS v3 7.3
EPSS 0.0011
EPSS Percentile 1.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-416 CWE-787 CWE-825
Status published
Products (2)
The Document Foundation/LibreOffice 25.8 - < 25.8.7
The Document Foundation/LibreOffice 26.2 - < 26.2.3
Published Jun 15, 2026
Tracked Since Jun 15, 2026