NULL Pointer Dereference Affecting kernel package, versions <0:3.10.0-229.el7


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.4% (32nd percentile)

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  • Snyk IDSNYK-CENTOS7-KERNEL-2042130
  • published26 Jul 2021
  • disclosed20 Dec 2013

Introduced: 20 Dec 2013

CVE-2014-8173  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Centos:7 kernel to version 0:3.10.0-229.el7 or higher.

NVD Description

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

The pmd_none_or_trans_huge_or_clear_bad function in include/asm-generic/pgtable.h in the Linux kernel before 3.13 on NUMA systems does not properly determine whether a Page Middle Directory (PMD) entry is a transparent huge-table entry, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted MADV_WILLNEED madvise system call that leverages the absence of a page-table lock.

CVSS Base Scores

version 3.1