CVE-2026-63273 — Heap buffer overflow in PDF import encryption handling
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 ow…
Published: 2026-09-22 · CVSS: 5.4 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7