CVE-2017-1000405

CVE Details

Release Date:	2017-11-30
Impact:	Important	What is this?

Description

The Linux Kernel versions 2.6.38 through 4.14 have a problematic useof pmd_mkdirty() in the touch_pmd() function inside the THP implementation. touch_pmd() can be reached by get_user_pages(). In such case, the pmd will become dirty. This scenario breaks the new can_follow_write_pmd()'s logic - pmd can become dirty without going through a COW cycle. This bug is not as severe as the original Dirty

See more information about CVE-2017-1000405 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 metrics

Base Score:	6.9
Vector String:	AV:L/AC:M/Au:N/C:C/I:C/A:C
Version:	2.0
Attack Vector:	Local
Attack Complexity:	Medium
Authentication:	None
Confidentiality Impact:	Complete
Integrity Impact:	Complete
Availability Impact:	Complete

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel-uek)	ELSA-2017-3651	2017-12-07
Oracle Linux version 7 (kernel-uek)	ELSA-2017-3651	2017-12-07
Oracle VM version 3.4 (kernel-uek)	OVMSA-2017-0172	2017-12-07