Language: Java
Label: vulnerable
CWE: CWE-502 \u2014 Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

Code:
	public ByteBuf readByteBuf() throws IOException {
		byte[] arr = readByteArray();
		if (arr == null) {
			throw new NullPointerException("Buffer may not be null, but read null");
		} else {
			return wrappedBuffer(arr);
		}
	}