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 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.
CVE-2026-63273
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-63273
LibreOffice
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "The Document Foundation",
"product": "LibreOffice",
"versions": [
{
"status": "affected",
"version": "26.2",
"lessThan": "< 26.2.5",
"versionType": "26.2 series"
}
],
"defaultStatus": "unknown"
}
]- Related CVEs
- CVE-2026-63273
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #3140 · Revision 1
- Added to Heist Feed
- Publisher date