CVE-2016-9178

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Summary

CVECVE-2016-9178
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-11-28 03:59:13 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionThe __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel before 4.7.5 does not initialize a certain integer variable, which allows local users to obtain sensitive information from kernel stack memory by triggering failure of a get_user_ex call.

Risk And Classification

Primary CVSS: v3.0 5.5 MEDIUM from [email protected]

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

EPSS: 0.000700000 probability, percentile 0.212090000 (date 2026-05-10)

Problem Types: CWE-200 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary5.5MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.0[email protected]Primary2.1AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS v3.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.5 af854a3a-2127-422b-91ae-364da2661108 www.kernel.org Release Notes
oss-security - Re: kernel: fix minor infoleak in get_user_ex() af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Third Party Advisory
fix minor infoleak in get_user_ex() · torvalds/linux@1c109fa · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Issue Tracking, Patch, Third Party Advisory
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Issue Tracking, Patch, Third Party Advisory
Bug 1391908 – CVE-2016-9178 kernel: Information leak in get_user_ex function af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking
Linux Kernel CVE-2016-9178 Local Information Disclosure Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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