The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.
Published 2012-11-23 20:55:03
Updated 2017-07-01 01:29:02
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: Input validationDenial of service

Exploit prediction scoring system (EPSS) score for CVE-2012-3495

Probability of exploitation activity in the next 30 days: 0.06%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 26 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2012-3495

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
6.1
MEDIUM AV:L/AC:L/Au:N/C:P/I:P/A:C
3.9
8.5
NIST

CWE ids for CVE-2012-3495

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2012-3495

Products affected by CVE-2012-3495

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