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.
Advisories
Source ID Title
EUVD EUVD EUVD-2016-10445 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.
Ubuntu USN Ubuntu USN USN-3146-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-3146-2 Linux kernel (Xenial HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-3161-4 Linux kernel (Qualcomm Snapdragon) vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-06T02:59:03.223Z

Reserved: 2016-11-27T00:00:00

Link: CVE-2016-9644

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2016-11-28T03:59:18.283

Modified: 2025-04-12T10:46:40.837

Link: CVE-2016-9644

cve-icon Redhat

Severity : Important

Publid Date: 2016-11-03T00:00:00Z

Links: CVE-2016-9644 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses