U.S. government warns of severe CopyFail bug affecting major versions of Linux

Researchers released exploit code for CopyFail, a critical Linux kernel flaw affecting version 7.0 and earlier.

U.S. officials say the vulnerability is now being actively exploited in the wild, raising the urgency for defenders.

CISA has directed civilian federal agencies to patch affected systems by May 15.

The flaw can grant root access on widely used Linux distributions, putting enterprise, government, and datacenter systems at risk.