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OpenAdvisories
Medium · 5.4 CVE-2026-63274 EUVD-2026-84354GHSA-q9rh-47xp-mj2m

Heap buffer overflow in PDF import stream handling

Published Sep 22, 2026 · Updated Sep 28, 2026 · Assigned by Document Fdn.

Description

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing a stream object. The length of the stream was taken from the object's own dictionary and was not checked against the number of bytes actually present, so copying the stream read and wrote past the end of the buffer holding it. In fixed versions the declared length is clamped to the bytes actually read.

Affected products

VendorProductAffectedFixed
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.

ReleasePackageFixed inAdvisory
Debian 14 libreoffice 4:26.2.5.2-1 —
Debian 13 libreoffice 4:25.2.3-2+deb13u7 —
Debian 12 libreoffice No fix yet —
ReleasePackageFixed inAdvisory
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 —
ReleasePackageFixed inAdvisory
RHEL 9 autocorr-af +178 1:7.1.8.1-15.el9_8.3 RHSA-2026:82013

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
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 ↗
ReleasePackageFixed inAdvisory
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

ReleasePackageFixed inAdvisory
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

References