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AOSA-2016-0019: update Linux Kernel to 4.8.3

Please update your linux+kernel package to version 55 (which depends on linux-kernel-4.8.3).

A severe security vulnerability was disclosed for Linux Kernel versions <= 4.8.2 that:

"A race condition was found in the way the Linux kernel's memory subsystem handled the copy-on-write (COW) breakage of private read-only memory mappings. An unprivileged local user could use this flaw to gain write access to otherwise read-only memory mappings and thus increase their privileges on the system."

Which was consequently assigned with a CVE:


Relevant documentation: