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CVE-2012-4536

13
FAUCET Score

CVE-2012-4536 describes a denial-of-service vulnerability in Xen 2.2, where local guest OS administrators can crash the Xen hypervisor by providing a crafted pirq value to the domain_pirq_to_emuirq or physdev_unmap_pirq functions, leading to an out-of-bounds read. This vulnerability has a low severity CVSS score of 2.1, indicating a local attack vector with low complexity and only impacting 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
2.2.0CPE matchmatch criteria
cpe:2.3:o:xen:xen:2.2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.1LOW

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.42%
Probability of exploitation in next 30 days
EPSS Percentile
34.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0042 is in the 62nd percentile among its peer group of 2,096 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.6 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

Vendor Advisories (1)

redhatCVE-2012-4536Moderate

kernel: xen: PIRQ unmap missing range check causes hypervisor crash

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.xen.org / archives/html/xen-announce/2012-11/msg00003.html
Vendor Advisory
osvdb.org / 87297
secunia.com / advisories/51200
secunia.com / advisories/51324
secunia.com / advisories/51352
secunia.com / advisories/51413
secunia.com / advisories/55082
security.gentoo.org / glsa/glsa-201309-24.xml
exchange.xforce.ibmcloud.com / vulnerabilities/80023
security.gentoo.org / glsa/201604-03
openwall.com / lists/oss-security/2012/11/13/2
securityfocus.com / bid/56498
securitytracker.com / id