Just a few moments ago (September 19, 2016), Canonical published several security advisories to inform the Ubuntu Linux community about the availability of new Linux kernel updates for all supported Ubuntu releases.
According to Ubuntu Security Notice USN-3084-1, three security flaws are affecting the Ubuntu 16.04 LTS (Xenial Xerus) operating system and later versions, as well as any derivative. The first one is a race condition in Linux kernel’s audit subsystems, which could allow a local attacker to interrupt system-call auditing or damage the audit logs.
The second security issue is related to Linux kernel’s KVM (Kernel-based Virtual Machine) hypervisor implementation, which didn’t work correctly on PPC64 (PowerPC 64-bit) and PowerPC (PPC) platforms, thus allowing an unprivileged attacker to cause a CPU lockup in the host operating system.
Lastly, Ubuntu 16.04 LTS was affected by a race condition in Linux kern… (read more)
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