It was discovered that QPDF incorrectly handled certain memory operations when decoding JSON files. If a user or automated system were tricked into processing a specially crafted JSON file, QPDF could be made to crash, resulting in a denial of service, or possibly execute arbitrary code.
{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libqpdf-dev",
            "binary_version": "11.5.0-1ubuntu1.1"
        },
        {
            "binary_name": "libqpdf29",
            "binary_version": "11.5.0-1ubuntu1.1"
        },
        {
            "binary_name": "libqpdf29-dbgsym",
            "binary_version": "11.5.0-1ubuntu1.1"
        },
        {
            "binary_name": "qpdf",
            "binary_version": "11.5.0-1ubuntu1.1"
        },
        {
            "binary_name": "qpdf-dbgsym",
            "binary_version": "11.5.0-1ubuntu1.1"
        }
    ]
}