Dirty COW is a privilege escalation vulnerability in the Linux Kernel. The Dirty COW vulnerability allows attackers to gain root access to servers and take control over the whole system and therefore considered as critical vulnerability.
The security hole was detected by researcher Phil Oester, who found out a race condition in the way the Linux kernel’s memory subsystem handles copy-on-write (COW) breakages of private read-only memory mappings. The bug has existed since around 2.6.22 (released in 2007) and was fixed on Oct 18, 2016. Dirty Cow is referenced by CVE-2016-5195.
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