CVE-2012-4535

kernel: xen: VCPU timer overflow leads to PCPU deadlock and host death-by-watchdog

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Xen 3.4 through 4.2, and possibly earlier versions, allows local guest OS administrators to cause a denial of service (Xen infinite loop and physical CPU consumption) by setting a VCPU with an "inappropriate deadline."

Xen 3.4 hasta 4.2 y posiblemente versiones anteriores permite a los administradores de sistemas operativos clientes locales causar una denegación de servicio (bucle infinito en Xen y consumo de CPU física), configurando un VCPU con una "fecha límite inapropiada".

Multiple vulnerabilities have been found in Xen, allowing attackers on a Xen Virtual Machine to execute arbitrary code, cause Denial of Service, or gain access to data on the host. Versions less than 4.2.2-r1 are affected.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2012-08-21 CVE Reserved
2012-11-21 CVE Published
2024-08-06 CVE Updated
2025-03-19 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-399: Resource Management Errors

CAPEC

References (25)

URL	Tag	Source
http://osvdb.org/87298	Vdb Entry
http://secunia.com/advisories/51200	Third Party Advisory
http://secunia.com/advisories/51324	Third Party Advisory
http://secunia.com/advisories/51352	Third Party Advisory
http://secunia.com/advisories/51413	Third Party Advisory
http://secunia.com/advisories/51468	Third Party Advisory
http://secunia.com/advisories/55082	Third Party Advisory
http://www.openwall.com/lists/oss-security/2012/11/13/1	Mailing List
http://www.securityfocus.com/bid/56498	Vdb Entry
http://www.securitytracker.com/id?1027759	Vdb Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/80022	Vdb Entry

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00008.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00009.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2012-12/msg00001.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html	2017-08-29
http://lists.opensuse.org/opensuse-security-announce/2014-04/msg00000.html	2017-08-29
http://lists.xen.org/archives/html/xen-announce/2012-11/msg00001.html	2017-08-29
http://rhn.redhat.com/errata/RHSA-2012-1540.html	2017-08-29
http://security.gentoo.org/glsa/glsa-201309-24.xml	2017-08-29
http://www.debian.org/security/2012/dsa-2582	2017-08-29
https://security.gentoo.org/glsa/201604-03	2017-08-29
https://access.redhat.com/security/cve/CVE-2012-4535	2012-12-04
https://bugzilla.redhat.com/show_bug.cgi?id=870086	2012-12-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.4.0 Search vendor "Xen" for product "Xen" and version "3.4.0"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.4.1 Search vendor "Xen" for product "Xen" and version "3.4.1"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.4.2 Search vendor "Xen" for product "Xen" and version "3.4.2"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.4.3 Search vendor "Xen" for product "Xen" and version "3.4.3"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				3.4.4 Search vendor "Xen" for product "Xen" and version "3.4.4"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.0 Search vendor "Xen" for product "Xen" and version "4.0.0"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.1 Search vendor "Xen" for product "Xen" and version "4.0.1"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.2 Search vendor "Xen" for product "Xen" and version "4.0.2"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.3 Search vendor "Xen" for product "Xen" and version "4.0.3"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.0.4 Search vendor "Xen" for product "Xen" and version "4.0.4"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.1.0 Search vendor "Xen" for product "Xen" and version "4.1.0"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.1.1 Search vendor "Xen" for product "Xen" and version "4.1.1"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.1.2 Search vendor "Xen" for product "Xen" and version "4.1.2"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.1.3 Search vendor "Xen" for product "Xen" and version "4.1.3"		-		Affected
Xen Search vendor "Xen"		Xen Search vendor "Xen" for product "Xen"				4.2.0 Search vendor "Xen" for product "Xen" and version "4.2.0"		-		Affected