Dirty COW: Linux kernel developer Greg Kroah-Hartman has announced three new maintenance updates for Linux 4.8, 4.7 and 4.4 from the LTS kernel series, which corrected a major security vulnerability.
The Linux kernel vulnerability is known as "Dirty COW," and is documented in CVE-2016-5195. In fact, it is a very bad bug that could be used by local users to write to any file even if it had read only rights.
The worst thing is that this security flaw exists from the Linux kernel at least from the 2.6.x series that reached the end of its life in February of this year.
"This is an ancient error that I tried to fix once eleven years ago," reveals Linus Torvalds in an email.
Of course, those who use Linux should upgrade their Kernel directly.