Linux gets fix for flaw that threatens security of shared Web hosts

The Linux operating system kernel has been patched against yet another flaw that leaves servers in some shared Web hosting environments susceptible to hijacking.

The vulnerability, formally cataloged as CVE-2014-3153, is located in the futex subsystem of Linux, according to an advisory published Thursday by Debian, a distributor of the open source OS. The flaw allows untrusted users with unprivileged system access to escalate their control. From there, they can crash the system or do other nefarious things, including possibly executing malicious code.

"Pinkie Pie discovered an issue in the futex subsystem that allows a local user to gain ring 0 control via the futex syscall," the advisory stated. "An unprivileged user could use this flaw to crash the kernel (resulting in denial of service) or for privilege escalation."

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