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Debian Oldstable LibreOffice Important Buffer Overflow Vuln DSA-6251-1

debian
Calendar Grey May 7, 2026
Debian Logo
Buffer overflow in LibreOffice fixed in Debian oldstable and stable releases. Upgrade recommended to avoid exploits.
Dun Anh Nguyen discovered a buffer overflow in LibreOffice, which could result in an out-of-bounds write if OOXML documents with malformed encryption parameters are opened
Topics%20covered

Topics Covered

security advisory buffer overflow debian important LibreOffice malformed encryption

Summary

For the oldstable distribution (bookworm), this problem has been fixed
in version 4:7.4.7-1+deb12u11.

For the stable distribution (trixie), this problem has been fixed in
version 4:25.2.3-2+deb13u4.

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/



Severity
important
Lowest
Low
Medium
High
Critical

Package: libreoffice
CVE ID: CVE-2026-4430

Topics%20covered

Topics Covered

security advisory buffer overflow debian important LibreOffice malformed encryption

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