CVE-2010-4247

The do_block_io_op function in (1) drivers/xen/blkback/blkback.c and (2) drivers/xen/blktap/blktap.c in Xen before 3.4.0 for the Linux kernel 2.6.18, and possibly other versions, allows guest OS users to cause a denial of service (infinite loop and CPU consumption) via a large production request index to the blkback or blktap back-end drivers. NOTE: some of these details are obtained from third party information.

Published: 2011-01-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2010-4247 is rated Low Risk (39.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.73%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2010-4247

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.62% 0.73% +0.10%
2 2025-03-30 0.83% 0.62% -0.21%
3 2025-03-29 — 0.83% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2010-4247

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 2.0 MEDIUM
AV:A/AC:L/Au:S/C:N/I:N/A:C Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 5.1 6.9 [email protected]

Weakness enumeration for CVE-2010-4247

OS Trackers for CVE-2010-4247

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2010-4247
ubuntu medium CVE-2010-4247 medium priority: Ubuntu including 9 source packages (linux, linux-ec2, …), 61 status rows across 7 suites (dapper, hardy, karmic, lucid, maverick, natty, upstream): DNE 33, not-affected 17, ignored 7, released 2, needed 1, needs-triage 1. https://ubuntu.com/security/CVE-2010-4247

Affected software / configurations for CVE-2010-4247

Vendor Product Version Raw CPE
citrix xen <= 3.3.2 cpe:2.3:a:citrix:xen:*:*:*:*:*:*:*:*
citrix xen 3.0.2 cpe:2.3:a:citrix:xen:3.0.2:*:*:*:*:*:*:*
citrix xen 3.0.3 cpe:2.3:a:citrix:xen:3.0.3:*:*:*:*:*:*:*
citrix xen 3.0.4 cpe:2.3:a:citrix:xen:3.0.4:*:*:*:*:*:*:*
citrix xen 3.1.3 cpe:2.3:a:citrix:xen:3.1.3:*:*:*:*:*:*:*
citrix xen 3.1.4 cpe:2.3:a:citrix:xen:3.1.4:*:*:*:*:*:*:*
citrix xen 3.2.0 cpe:2.3:a:citrix:xen:3.2.0:*:*:*:*:*:*:*
citrix xen 3.2.1 cpe:2.3:a:citrix:xen:3.2.1:*:*:*:*:*:*:*
citrix xen 3.2.2 cpe:2.3:a:citrix:xen:3.2.2:*:*:*:*:*:*:*
citrix xen 3.2.3 cpe:2.3:a:citrix:xen:3.2.3:*:*:*:*:*:*:*
citrix xen 3.3.0 cpe:2.3:a:citrix:xen:3.3.0:*:*:*:*:*:*:*
citrix xen 3.3.1 cpe:2.3:a:citrix:xen:3.3.1:*:*:*:*:*:*:*

References for CVE-2010-4247

cvelogic Threat Intelligence