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.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3140-1 advisory.

    Update to LibreOffice 26.2.5.1.

    Security issues fixed:

    - CVE-2026-4430: out-of-bounds write via crafted OOXML documents with mismatched encryption salt     parameters       (bsc#1264357).
    - CVE-2026-6039: denial of service via specially crafted DXF polyline import (bsc#1268494).
    - CVE-2026-6040: heap use-after-free when importing the blank-width characters of an ODF number format     (bsc#1268527).
    - CVE-2026-6045: heap buffer overflow via crafted EMF+ graphics import (bsc#1268497).
    - CVE-2026-6047: denial of service via heap buffer overflow in OOXML document processing (bsc#1268504).
    - CVE-2026-8356: denial of service via a specially crafted PPT file (bsc#1268522).
    - CVE-2026-8357: heap buffer overflow in Calc formula compilation (bsc#1268528).
    - CVE-2026-8358: heap buffer overflow in spreadsheet tracked-changes import (bsc#1268529).
    - CVE-2026-50593: graphite2: out-of-bounds write via Graphite actions (bsc#1267735).

    Other updates and bugfixes:

    - Update to LibreOffice 26.2.5.1.
      - Update bundled dependencies:
        * `fontconfig` 2.17.1 -> 2.18.0
        * `graphite2-minimal` 1.3.14 -> 1.3.15
        * `libcmis` 0.6.2 -> 0.6.3
        * `libgpg-error` 1.59 -> 1.61
        * `lxml` 6.1.0 -> 6.1.1
        * `md4c` 0.5.2 -> 0.5.3
        * `poppler` 26.04.0 -> 26.06.0
        * `sqlite-amalgamation` 3530000 -> 3530100
        * `xmlsec1` 1.3.9 -> 1.3.11
    - Update to LibreOffice 26.2.3.2 (PED-16098).
      - Upgraded dependencies:
        * `boost`: 1_88_0 -> 1_89_0
        * `freetype`: 2.14.1 -> 2.14.3
        * `harfbuzz`: 12.3.0 -> 12.3.2
        * `icu4c`: 77_1 -> 78.3
        * `libgpg-error`: 1.56 -> 1.59
        * `liborcus`: 0.20.1 -> 0.21.0
        * `pdfium`: 7012 -> 7471
        * `poppler`: 25.12.0 -> 26.04.0
        * `skia`: m136 -> m142
      - New bundled sources:
        * `afdko` 4.0.3
        * `antlr4-cpp-runtime` 4.13.2
        * `fast_float` 8.2.2
        * `libffi` 3.5.2
        * `lxml` 6.1.0
        * `md4c` 0.5.2
        * `meson` 1.8.3
        * `Python` 3.12.13
        * `sqlite` 3530000
        * `xmlsec1` 1.3.9
        * `xz` 5.8.3
    - Add `patch`, required to build the bundled Python on all architectures.
    - Bundling a specific Python is now required as the one we ship (3.6) is too old to build `harfbuzz`.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8534-1 advisory.

    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)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4633 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4633-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                       Rene Engelhard     June 17, 2026                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : libreoffice     Version        : 4:7.4.7-1+deb12u13     CVE ID         : CVE-2026-6039 CVE-2026-6045 CVE-2026-8356 CVE-2026-8357                      CVE-2026-8358

    Multiple security vulnerabilities were discovered in LibreOffice,     which could result in denial of service or potentially the execution     of arbitrary code if malformed files are opened.

    For Debian 12 bookworm, these problems have been fixed in version     4:7.4.7-1+deb12u13.

    We recommend that you upgrade your libreoffice packages.

    For the detailed security status of libreoffice please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libreoffice

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-8356)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6346 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6346-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     June 15, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : libreoffice     CVE ID         : CVE-2026-6039 CVE-2026-6040 CVE-2026-6045 CVE-2026-8356                      CVE-2026-8357 CVE-2026-8358

    Multiple security vulnerabilities were discovered in LibreOffice, which     could result in denial of service or potentially the execution of     arbitrary code if malformed files are opened.

    For the stable distribution (trixie), these problems have been fixed in     version 4:25.2.3-2+deb13u5.

    We recommend that you upgrade your libreoffice packages.

    For the detailed security status of libreoffice please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libreoffice

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
328909	SUSE SLED15: libreoffice / libreoffice-base / libreoffice-base-drivers-firebird / etc (SUSE-SU-2026:3140-1)	Nessus	SuSE Local Security Checks	medium
326801	Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : LibreOffice vulnerabilities (USN-8534-1)	Nessus	Ubuntu Local Security Checks	medium
321496	Debian dla-4633 : fonts-opensymbol - security update	Nessus	Debian Local Security Checks	medium
321137	Linux Distros Unpatched Vulnerability : CVE-2026-8356	Nessus	Misc.	medium
321128	Debian dsa-6346 : fonts-opensymbol - security update	Nessus	Debian Local Security Checks	medium

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CVE-2026-8356

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