CVE-2014-7975 Affecting kernel-rt-debug-kvm package, versions <0:3.10.0-693.rt56.617.el7


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-RHEL7-KERNELRTDEBUGKVM-4750049
  • published26 Jul 2021
  • disclosed8 Oct 2014

Introduced: 8 Oct 2014

CVE-2014-7975  (opens in a new tab)

How to fix?

Upgrade RHEL:7 kernel-rt-debug-kvm to version 0:3.10.0-693.rt56.617.el7 or higher.
This issue was patched in RHSA-2017:2077.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-kvm package and not the kernel-rt-debug-kvm package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

The do_umount function in fs/namespace.c in the Linux kernel through 3.17 does not require the CAP_SYS_ADMIN capability for do_remount_sb calls that change the root filesystem to read-only, which allows local users to cause a denial of service (loss of writability) by making certain unshare system calls, clearing the / MNT_LOCKED flag, and making an MNT_FORCE umount system call.

CVSS Scores

version 3.1