cve/2010/CVE-2010-4247.md

### [CVE-2010-4247](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4247)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20n%2Fa%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

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.

### POC

#### Reference
- http://www.redhat.com/support/errata/RHSA-2011-0004.html
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html

#### Github
No PoCs found on GitHub currently.