Description
LibreOffice converts CFF fonts to Type 1 when it subsets a font, which happens when a document is exported to PDF, and CFF fonts may be embedded in documents. A stack buffer overflow existed in that conversion. The converted operators were written into a fixed size buffer with no check that they still fit, so a glyph emitting many operators wrote past the end of the buffer. In fixed versions the remaining capacity is tracked and the conversion stops when it is used up.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The Document Foundation | LibreOffice | 26.2 – < < 26.2.5 | < 26.2.5 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libreoffice | 4:26.2.5.2-1 | — |
| Debian 13 | libreoffice | 4:25.2.3-2+deb13u7 | — |
| Debian 12 | libreoffice | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libreoffice | 4:26.2.6.3-0ubuntu0.26.04.2 | USN-8868-1 |
| Ubuntu 24.04 LTS | libreoffice | 4:24.2.7-0ubuntu0.24.04.7 | USN-8868-1 |
| Ubuntu 22.04 LTS | libreoffice | 1:7.3.7-0ubuntu0.22.04.13 | USN-8868-1 |
| Ubuntu 20.04 LTS | libreoffice | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | autocorr-af +178 | 1:7.1.8.1-15.el9_8.3 | RHSA-2026:82013 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | autocorr-af +178 | 1:7.1.8.1-15.el9_8.3.alma.1 | ALSA-2026:82013 |
| AlmaLinux 8 | autocorr-af +172 | 1:7.1.8.1-3.el8_10.alma.1 | ALSA-2026:88164 |
| AlmaLinux 8 | flute | 1.3.0-19.OOo31.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | libbase | 1.1.3-21.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | libfonts | 1.1.3-23.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | libformula +1 | 1.1.3-20.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | liblayout | 0.2.10-19.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | libloader +1 | 1.1.3-19.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | libserializer | 1.1.2-20.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | pentaho-reporting-flow-engine | 1:0.9.4-17.el8_10 | ALSA-2026:88164 |
| AlmaLinux 8 | sac | 1.3-29.el8_10 | ALSA-2026:88164 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | autocorr-af +177 | 1:7.1.8.1-16.el9_9.1 | RLSA-2026:98491 |
| Rocky Linux 9 | libreoffice | 1:7.1.8.1-15.el9_8.3 | RLSA-2026:98491, RLSA-2026:82013 |
| Rocky Linux 8 | flute | 1.3.0-19.OOo31.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libbase | 1.1.3-21.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libfonts | 1.1.3-23.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libformula +1 | 1.1.3-20.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | liblayout | 0.2.10-19.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libloader +1 | 1.1.3-19.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libreoffice | 1:7.1.8.1-3.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | libserializer | 1.1.2-20.el8_10 | RLSA-2026:88164 |
| Rocky Linux 8 | pentaho-reporting-flow-engine | 1:0.9.4-17.el8_10 | RLSA-2026:88164 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | autocorr-af +178 | 1:7.1.8.1-15.0.1.el9_8.3 | ELSA-2026-82013 |
| Oracle Linux 8 | autocorr-af +172 | 1:7.1.8.1-3.0.1.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | flute | 1.3.0-19.OOo31.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | libbase | 1.1.3-21.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | libfonts | 1.1.3-23.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | libformula +1 | 1.1.3-20.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | liblayout | 0.2.10-19.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | libloader +1 | 1.1.3-19.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | libserializer | 1.1.2-20.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | pentaho-reporting-flow-engine | 1:0.9.4-17.el8_10 | ELSA-2026-88164 |
| Oracle Linux 8 | sac | 1.3-29.el8_10 | ELSA-2026-88164 |
Advisories 10
- RLSA-2026:98491 Important: libreoffice security update Rocky Linux Security Advisories · Nov 13, 2026
- WID-SEC-2026-3521 LibreOffice: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- ALSA-2026:82013 Important: libreoffice security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:88164 Important: flute, libbase, libfonts, libformula, liblayout, libloader, libreoffice, librepository, libserializer, pentaho-libxml, pentaho-reporting-flow-engine, and sac security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ELSA-2026-88164 Important: flute, libbase, libfonts, libformula, liblayout, libloader, libreoffice, librepository, libserializer, pentaho-libxml, pentaho-reporting-flow-engine, and sac security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 27, 2026
- RLSA-2026:88164 Important: flute, libbase, libfonts, libformula, liblayout, libloader, libreoffice, librepository, libserializer, pentaho-libxml, pentaho-reporting-flow-engine, and sac security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 23, 2026
- RHSA-2026:82013 Red Hat Security Advisory: libreoffice security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RLSA-2026:82013 Important: libreoffice security update Rocky Linux Security Advisories · Oct 14, 2026
- ELSA-2026-82013 Important: libreoffice security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 13, 2026
- USN-8868-1 libreoffice vulnerabilities Ubuntu Security Notices (USN) · Oct 5, 2026