Description
LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing an encrypted document. The length of the decryption key was taken from the document's own encryption dictionary and was used to fill a fixed size key buffer without being checked against it, so a length larger than that buffer wrote past its end. In fixed versions a declared key length larger than the buffer is rejected.
Published: 2026-09-22
Score: 5.4 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 22 Sep 2026 11:30:00 +0000

Type Values Removed Values Added
Description LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing an encrypted document. The length of the decryption key was taken from the document's own encryption dictionary and was used to fill a fixed size key buffer without being checked against it, so a length larger than that buffer wrote past its end. In fixed versions a declared key length larger than the buffer is rejected.
Title Heap buffer overflow in PDF import encryption handling
Weaknesses CWE-787
References
Metrics cvssV4_0

{'score': 5.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: Document Fdn.

Published:

Updated: 2026-09-22T12:27:46.334Z

Reserved: 2026-07-16T08:17:05.512Z

Link: CVE-2026-63273

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-22T12:17:13.007

Modified: 2026-09-22T12:17:13.007

Link: CVE-2026-63273

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-22T12:30:07Z

Weaknesses