CVE-2016-6516

Severity Score

7.4

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Race 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.

Condición de carrera en la función ioctl_file_dedupe_range en fs/ioctl.c en el kernel de Linux hasta la versión 4.7 permite a usuarios locales provocar una denegación de servicio (desbordamiento de búfer basado en memoria dinámica) o posiblemente obtener privilegios cambiando un cierto valor de recuento, también conocido como una vulnerabilidad de "doble recuperación".

*Credits: N/A

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-08-01 CVE Reserved
2016-08-06 CVE Published
2018-02-26 First Exploit
2024-08-06 CVE Updated
2024-12-17 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CAPEC

References (6)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/07/31/6	Mailing List
http://www.securityfocus.com/bid/92259	Vdb Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1362457	Issue Tracking

URL	Date	SRC
https://github.com/wpengfei/CVE-2016-6516-exploit	2018-02-26

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=10eec60ce79187686e052092e5383c99b4420a20	2016-11-28
https://github.com/torvalds/linux/commit/10eec60ce79187686e052092e5383c99b4420a20	2016-11-28

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				<= 4.7 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.7"		-		Affected