[USN-8534-1] LibreOffice vulnerabilities

[noreply+usn-bot at canonical.com]

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Ubuntu Security Notice USN-8534-1
July 13, 2026

libreoffice vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in LibreOffice.

Software Description:
- libreoffice: Office productivity suite

Details:

It was discovered that LibreOffice incorrectly handled importing DXF
drawings. An attacker could use this issue to cause LibreOffice to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2026-6039)

It was discovered that LibreOffice incorrectly handled certain ODF number
formats. An attacker could use this issue to cause LibreOffice to crash,
resulting in a denial of service, or possibly execute arbitrary code. This
issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-6040)

It was discovered that LibreOffice incorrectly handled importing EMF+
graphics. An attacker could use this issue to cause LibreOffice to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2026-6045)

It was discovered that LibreOffice incorrectly handled importing PPT
presentations. An attacker could use this issue to cause LibreOffice to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2026-8356)

It was discovered that LibreOffice Calc incorrectly handled compiling
certain formulas. An attacker could use this issue to cause LibreOffice to
crash, resulting in a denial of service, or possily execute arbitrary code.
(CVE-2026-8357)

It was discovered that LibreOffice Calc incorrectly handled importing
spreadsheet tracked changes. An attacker could use this issue to cause
LibreOffice to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2026-8358)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
  libreoffice                     4:26.2.4.2-0ubuntu0.26.04.2

Ubuntu 24.04 LTS
  libreoffice                     4:24.2.7-0ubuntu0.24.04.6

Ubuntu 22.04 LTS
  libreoffice                     1:7.3.7-0ubuntu0.22.04.12

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-8534-1
  CVE-2026-6039, CVE-2026-6040, CVE-2026-6045, CVE-2026-8356,
  CVE-2026-8357, CVE-2026-8358

Package Information:
  https://launchpad.net/ubuntu/+source/libreoffice/4:26.2.4.2-0ubuntu0.26.04.2
  https://launchpad.net/ubuntu/+source/libreoffice/4:24.2.7-0ubuntu0.24.04.6
  https://launchpad.net/ubuntu/+source/libreoffice/1:7.3.7-0ubuntu0.22.04.12
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