CVE-2014-8173

HIGH

Description

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.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ee53664bda169f519ce3c6a22d378f0b946c8178

http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html

http://rhn.redhat.com/errata/RHSA-2015-0290.html

http://rhn.redhat.com/errata/RHSA-2015-0694.html

https://bugzilla.redhat.com/show_bug.cgi?id=1198457

https://github.com/torvalds/linux/commit/ee53664bda169f519ce3c6a22d378f0b946c8178

Details

Source: MITRE

Published: 2015-03-16

Updated: 2017-01-03

Risk Information

CVSS v2.0

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH