CVE-2016-6516

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Summary

CVECVE-2016-6516
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-08-06 20:59:15 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionRace condition in the ioctl_file_dedupe_range function in fs/ioctl.c in the Linux kernel through 4.7 allows local users to cause a denial of service (heap-based buffer overflow) or possibly gain privileges by changing a certain count value, aka a "double fetch" vulnerability.

Risk And Classification

Primary CVSS: v3.0 7.4 HIGH from [email protected]

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

Problem Types: CWE-119 | CWE-362 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary7.4HIGHCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary4.4AV:L/AC:M/Au:N/C:P/I:P/A:P

CVSS v3.0 Breakdown

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

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

CVSS v2.0 Breakdown

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

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

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
vfs: ioctl: prevent double-fetch in dedupe ioctl · torvalds/linux@10eec60 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch
Linux Kernel CVE-2016-6516 Local Heap Overflow Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Bug 1362457 – CVE-2016-6516 kernel: vfs: ioctl: double fetch leading to heap overflow af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory, VDB Entry
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
oss-security - CVE Request: Linux >= 4.5 double fetch leading to heap overflow af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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