CVE-2016-9644

The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms via a crafted application. NOTE: this vulnerability exists because of incorrect backporting of the CVE-2016-9178 patch to older kernels.

CVSS v3.0 7.8 HIGH
CVSS v2.0 9.3 HIGH

7.8^/10

CVSS v3.0 : HIGH

Vector : AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.3^/10

CVSS v2.0 : HIGH

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

Exploitability : 8.6 / Impact : 10.0

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://lwn.net/Articles/705220/	Product
http://www.openwall.com/lists/oss-security/2016/11/07/4	Mailing List Third Party Advisory
http://www.securityfocus.com/bid/94545
http://www.ubuntu.com/usn/USN-3146-2
http://www.ubuntu.com/usn/USN-3146-1

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel:4.4.28:::::::*
	cpe:2.3:o:linux:linux_kernel:4.4.22:::::::*
	cpe:2.3:o:linux:linux_kernel:4.4.24:::::::*
	cpe:2.3:o:linux:linux_kernel:4.4.25:::::::*
	cpe:2.3:o:linux:linux_kernel:4.4.26:::::::*
	cpe:2.3:o:linux:linux_kernel:4.4.27:::::::*
	cpe:2.3:o:linux:linux_kernel:4.4.23:::::::*

Information

Published : 2016-11-27 19:59

Updated : 2017-01-06 19:00

NVD link : CVE-2016-9644

Mitre link : CVE-2016-9644

JSON object : View

CWE

CWE-264

Permissions, Privileges, and Access Controls

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Products Affected

linux

linux_kernel

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