From Ubuntu 18.04.2 LTS Ubuntu 19.04 of the Linux Hardware Enablement (HWE) kernel contains the same fix for Ubuntu Canonical added in the latest kernel 19.04 last week four security vulnerabilities, including the discovery of an integer overflow ( CVE-2019- 11487 ) Linux kernel, as local attacker can use an exploit to execute arbitrary code or cause a denial of service (system crash), which may cause the problem free of charge.
In addition, the security patch addresses the conditions of competition (Google Project Zero's Jann Horn found in the Linux kernel core dump when performing CVE-2019-11599 ), which could allow a local attacker to refuse to disclose sensitive information or cause a system crash Service (DoS attacks).
Additionally fix two problems (found in the Linux kernel EXT4 file system implementation and Bluetooth Human Interface Device protocol (HIDP) implementation CVE-2019-11833 and CVE-2019-11884 ), both of which may allow a local attacker expose sensitive information (kernel memory).
It urged users to update their systems immediately
Note again that this applies only to the use of kernel version of Ubuntu 19.04 Linux (HWE) core Ubuntu 18.04.2 LTS users. After installing the new kernel version, you must restart the computer to correctly applying the patch. In addition, you may have to rebuild and re-install any third-party kernel modules you may have installed.