xen: request-processing loop is unbounded in blkback
Published Jan 11, 2011
5.5
MEDIUMCVSS 2.0
EPSS 0.73%
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.
Affected products
No data.
- ≤ 3.3.2
- 3.0.2
- 3.0.3
- 3.0.4
- 3.1.3
- 3.1.4
- 3.2.0
- 3.2.1
- 3.2.2
- 3.2.3
- 3.3.0
- 3.3.1
Running on/with
- 2.6.18
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-194.32.1.el5
Fixed · RHSA-2011:0004
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-194.32.1.el5 | Fixed | RHSA-2011:0004 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:A/AC:L/Au:S/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.73% (0.00725) | 52.37th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.73% (0.00725) | 49.07th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.45% (0.00447) | 61.43th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00064) | 30.08th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.06% (0.00064) | 28.17th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00064) | 26.16th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
References (16)
- http://secunia.com/advisories/35093 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/42789 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/46397 third-party-advisoryx_refsource_SECUNIA
- http://www.openwall.com/lists/oss-security/2010/11/23/1 mailing-listx_refsource_MLISTPatch
- http://www.openwall.com/lists/oss-security/2010/11/24/8 mailing-listx_refsource_MLISTPatch
- http://www.redhat.com/support/errata/RHSA-2011-0004.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/archive/1/520102/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/45029 vdb-entryx_refsource_BID
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html x_refsource_CONFIRM
- http://www.vupen.com/english/advisories/2011/0024 vdb-entryx_refsource_VUPEN
- http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/7070d34f251c x_refsource_MISCPatch
- http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/77f831cbb91d x_refsource_MISCPatch
- https://access.redhat.com/security/cve/CVE-2010-4247 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=656206 x_refsource_CONFIRMPatchIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2010-4247
- https://www.cve.org/CVERecord?id=CVE-2010-4247
Change history (0)
No recorded changes yet.