CVE-2026-63274 — Heap buffer overflow in PDF import stream handling

Affected: The Document Foundation LibreOffice

LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing a stream object. The length of the stream was taken from the object's own dictionary and was not checked against the number of bytes actually present, so copying the stream read and wrote past the end of the buffer holding it. In fixed versions the declared length is clamped to the bytes actually read.

USN-8868-1 — libreoffice vulnerabilities

Affected: Ubuntu:22.04:LTS: libreoffice, Ubuntu:24.04:LTS: libreoffice, Ubuntu:26.04:LTS: libreoffice

It was discovered that LibreOffice incorrectly handled WMF image imports. An attacker could possibly use this issue to cause LibreOffice to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-63272)

It was discovered that LibreOffice incorrectly handled PDF document imports. An attacker could possibly use this issue to cause LibreOffice to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-63273, CVE-2026-63274)

It was discovered that LibreOffice incorrectly handled CFF fonts embedded in documents. An attacker could possibly use this issue to cause LibreOffice to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-63275, CVE-2026-63276)

It was discovered that LibreOffice incorrectly validated package URLs. An attacker could possibly use this issue to obtain sensitive information. (CVE-2026-63278)

It was discovered that LibreOffice incorrectly handled PICT image imports. An attacker could possibly use this issue to cause LibreOffice to crash, resulting in a denial of service, or obtain sensitive information. (CVE-2026-63279)

It was discovered that LibreOffice incorrectly mitigated out-of-bounds writes via Graphite font actions. An attacker could possibly use this issue to cause LibreOffice to crash, resulting in a denial of service, or execute arbitrary code. (CVE-2026-50593)

Most recent entries from all

CVE-2026-63274 — Heap buffer overflow in PDF import stream handling

USN-8868-1 — libreoffice vulnerabilities