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CVE-2012-4535

14
FAUCET Score

CVE-2012-4535 describes a denial-of-service vulnerability affecting Xen versions 3.4 through 4.2. A local guest OS administrator can trigger an infinite loop and consume physical CPU resources by manipulating a VCPU's deadline. The vulnerability has a low CVSS score of 1.9, indicating a low severity due to requiring local access and medium attack complexity, with the primary impact being availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.4.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:*
3.4.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.4.1:*:*:*:*:*:*:*
3.4.2CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.4.2:*:*:*:*:*:*:*
3.4.3CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.4.3:*:*:*:*:*:*:*
3.4.4CPE matchmatch criteria
cpe:2.3:o:xen:xen:3.4.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

1.9LOW

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 72nd percentile among its peer group of 747 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-308.24.1.el5
View patch

Vendor Advisories (1)

redhatCVE-2012-4535Moderate

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

Nov 13, 2012

References

lists.opensuse.org / opensuse-security-announce/2012-11/msg00008.html
lists.opensuse.org / opensuse-security-announce/2012-11/msg00009.html
lists.opensuse.org / opensuse-security-announce/2012-11/msg00017.html
lists.opensuse.org / opensuse-security-announce/2012-11/msg00018.html
lists.opensuse.org / opensuse-security-announce/2012-12/msg00001.html
lists.opensuse.org / opensuse-security-announce/2014-03/msg00021.html
lists.opensuse.org / opensuse-security-announce/2014-04/msg00000.html
lists.xen.org / archives/html/xen-announce/2012-11/msg00001.html
Vendor Advisory
osvdb.org / 87298
rhn.redhat.com / errata/RHSA-2012-1540.html
secunia.com / advisories/51200
secunia.com / advisories/51324
secunia.com / advisories/51352
secunia.com / advisories/51413
secunia.com / advisories/51468
secunia.com / advisories/55082
security.gentoo.org / glsa/glsa-201309-24.xml
exchange.xforce.ibmcloud.com / vulnerabilities/80022
security.gentoo.org / glsa/201604-03
debian.org / security/2012/dsa-2582
openwall.com / lists/oss-security/2012/11/13/1
securityfocus.com / bid/56498
securitytracker.com / id