CVE-2016-2547

Ubuntu Security Notice USN-2929-2

Severity Score

5.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

sound/core/timer.c in the Linux kernel before 4.4.1 employs a locking approach that does not consider slave timer instances, which allows local users to cause a denial of service (race condition, use-after-free, and system crash) via a crafted ioctl call.

sound/core/timer.c en el kernel de Linux en versiones anteriores a 4.4.1 emplea un enfoque de bloqueo que no considera los casos de temporizador de esclavos, lo que permite a usuarios locales causar una denegación de servicio (condición de carrera, uso después de liberación de memoria y caída del sistema) a través de una llamada ioctl manipulada.

Ben Hawkes discovered that the Linux netfilter implementation did not correctly perform validation when handling IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. It was discovered that the Linux kernel did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

*Credits: N/A

Attack Vector

Local

Attack Complexity

High

Privileges Required

None

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

2016-02-23 CVE Reserved
2016-03-04 CVE Published
2024-08-05 CVE Updated
2025-07-09 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

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

CAPEC

References (20)

URL	Tag	Source
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.1	X_refsource_confirm
http://www.securityfocus.com/bid/83378	Vdb Entry
http://www.securitytracker.com/id/1035298	Vdb Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1311566	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b5a663aa426f4884c71cd8580adae73f33570f0d	2017-09-07
http://www.openwall.com/lists/oss-security/2016/01/19/1	2017-09-07
https://github.com/torvalds/linux/commit/b5a663aa426f4884c71cd8580adae73f33570f0d	2017-09-07

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html	2017-09-07
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html	2017-09-07
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html	2017-09-07
http://www.debian.org/security/2016/dsa-3503	2017-09-07
http://www.ubuntu.com/usn/USN-2929-1	2017-09-07
http://www.ubuntu.com/usn/USN-2929-2	2017-09-07
http://www.ubuntu.com/usn/USN-2930-1	2017-09-07
http://www.ubuntu.com/usn/USN-2930-2	2017-09-07
http://www.ubuntu.com/usn/USN-2930-3	2017-09-07
http://www.ubuntu.com/usn/USN-2931-1	2017-09-07
http://www.ubuntu.com/usn/USN-2932-1	2017-09-07
http://www.ubuntu.com/usn/USN-2967-1	2017-09-07
http://www.ubuntu.com/usn/USN-2967-2	2017-09-07

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"				<= 4.4 Search vendor "Linux" for product "Linux Kernel" and version " <= 4.4"		-		Affected