CVE-2026-8356 Affecting libreoffice package, versions <1:7.3.7-0ubuntu0.22.04.12


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.12% (3rd percentile)

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  • Snyk IDSNYK-UBUNTU2204-LIBREOFFICE-17340499
  • published14 Jul 2026
  • disclosed15 Jun 2026

Introduced: 15 Jun 2026

CVE-2026-8356  (opens in a new tab)

How to fix?

Upgrade Ubuntu:22.04 libreoffice to version 1:7.3.7-0ubuntu0.22.04.12 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libreoffice package and not the libreoffice package as distributed by Ubuntu. See How to fix? for Ubuntu:22.04 relevant fixed versions and status.

LibreOffice can import presentations in the legacy binary PPT format. A stack buffer overflow existed when importing a colour-replacement record. Two fixed-size colour tables were filled from the file, but the write position was not reset between the two passes over the record, so a file whose combined colour counts exceeded the table size wrote past the end of the tables on the stack. In fixed versions the unused second pass is no longer read into those tables.

CVSS Base Scores

version 3.1