CVE-2016-9644

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.0 7.8/10CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-264

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

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

Timeline

Published: Nov 28, 2016
Last modified: Jun 17, 2026
NVD status: Modified

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