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Canonical Releases Kernel Security Updates for Ubuntu 17.10 and Ubuntu 16.04 LTS

For Ubuntu 17.10 (Artful Aardvark) users, today’s security update addresses a bug (CVE-2018-8043) in Linux kernel’s Broadcom UniMAC MDIO bus controller driver, which improperly validated device resources, allowing a local attacker to crash the vulnerable system by causing a denial of service (DoS attack). For Ubuntu 16.04 LTS (Xenial Xerus) users, the security patch fixes a buffer overread vulnerability (CVE-2017-13305) in Linux kernel’s keyring subsystem and an information disclosure vulnerability (CVE-2018-5750) in the SMBus driver for ACPI Embedded Controllers. Both issues could allow a local attacker to expose sensitive information.