CVE-2026-6047

LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.

LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.

LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.

LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.

LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.

LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.

This update for libreoffice fixes the following issues:

Changes in libreoffice:

• Upgrade to 26.8.1.1.

• Perfect spec file sync between Factory, SLE and Leap 16.X.

• Update to LibreOffice 26.2.5.1 (was 25.2.5.2).

• Fix the following security issues:

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

This update for libreoffice fixes the following issues:

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.