552740 – Kernel: DoS via a crafted MADV_WILLNEED madvise system call (CVE-2014-8173)

Bug 552740 - Kernel: DoS via a crafted MADV_WILLNEED madvise system call (CVE-2014-8173)

Summary: Kernel: DoS via a crafted MADV_WILLNEED madvise system call (CVE-2014-8173)

Status:	RESOLVED FIXED

Alias:	None

Product:	Gentoo Security
Classification:	Unclassified
Component:	Kernel (show other bugs)
Hardware:	All Linux

Importance:	Normal normal (vote)
Assignee:	Gentoo Kernel Security

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Reported:	2015-06-21 13:40 UTC by GLSAMaker/CVETool Bot
Modified:	2021-10-25 00:07 UTC (History)
CC List:	1 user (show)

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Runtime testing required:	---

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Description GLSAMaker/CVETool Bot gentoo-dev

2015-06-21 13:40:06 UTC

CVE-2014-8173 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-8173):
  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.

Comment 1 John Helmert III archtester

2021-10-25 00:07:37 UTC

Patch in mainline 3.13 onwards