CVE-2026-63273

libreoffice: LibreOffice Draw: Denial of Service via malformed encrypted PDF import

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 22, 2026

Updated · September 23, 2026

Description

A flaw was found in LibreOffice Draw. This vulnerability allows a remote attacker to cause a denial of service by crafting a specially designed encrypted PDF document. When a user opens this malicious document, a heap buffer overflow occurs because the software incorrectly handles the decryption key length, leading to memory corruption. This can make the application unresponsive or crash.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')