CVE-2014-8086

Kernel: fs: ext4 race condition

Severity Score

4.7

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Race condition in the ext4_file_write_iter function in fs/ext4/file.c in the Linux kernel through 3.17 allows local users to cause a denial of service (file unavailability) via a combination of a write action and an F_SETFL fcntl operation for the O_DIRECT flag.

Condición de carrera en la función ext4_file_write_iter en fs/ext4/file.c en el kernel de Linux hasta 3.17 permite a usuarios locales causar una denegación de servicio (no disponibilidad de ficheros) a través de una combinación de una acción de escritura y una operación F_SETFL fcntl para el indicador O_DIRECT.

A race condition flaw was found in the Linux kernel's ext4 file system implementation that allowed a local, unprivileged user to crash the system by simultaneously writing to a file and toggling the O_DIRECT flag using fcntl(F_SETFL) on that file.

*Credits: N/A

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2014-10-09 CVE Reserved
2014-10-13 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
2024-08-06 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CAPEC

References (12)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2014/10/09/25	Mailing List
http://www.securityfocus.com/bid/70376	Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/96922	Third Party Advisory

URL	Date	SRC
http://www.spinics.net/lists/linux-ext4/msg45683.html	2024-08-06
https://lkml.org/lkml/2014/10/8/545	2024-08-06
https://lkml.org/lkml/2014/10/9/129	2024-08-06

URL	Date	SRC
http://www.spinics.net/lists/linux-ext4/msg45685.html	2020-08-14
https://bugzilla.redhat.com/show_bug.cgi?id=1151353	2015-03-17

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00004.html	2020-08-14
http://rhn.redhat.com/errata/RHSA-2015-0290.html	2020-08-14
http://rhn.redhat.com/errata/RHSA-2015-0694.html	2020-08-14
https://access.redhat.com/security/cve/CVE-2014-8086	2015-03-17

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"				<= 3.17 Search vendor "Linux" for product "Linux Kernel" and version " <= 3.17"		-		Affected
Suse Search vendor "Suse"		Suse Linux Enterprise Server Search vendor "Suse" for product "Suse Linux Enterprise Server"				11 Search vendor "Suse" for product "Suse Linux Enterprise Server" and version "11"		sp2, ltss		Affected