P30 smartphones with versions earlier than ELLE-AL00B 9.1.0.186(C00E180R2P1) have an improper authorization vulnerability. The software incorrectly performs an authorization check when a user attempts to perform certain action. Successful exploit could allow the attacker to update a crafted package.
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20190930-01-smartphone-en