CVE-2021-4034

These bugs may be exploited over-the-air via malicious packets on untrusted wireless networks, making them a significant threat

All US federal agencies that fall under the Federal Civilian Executive Branch are required to secure their systems against the bug by July 18

The vulnerability affects Linux kernel versions 5.4 through 5.6.10

The 12-year-old flaw exists in the pkexec component of Polkit system utility