kernel: xen: off-by-one shift in x86_64 __addr_ok()
Published Oct 1, 2013
5.5
MEDIUMCVSS 2.0
EPSS 0.59%
Description
Off-by-one error in the __addr_ok macro in Xen 3.3 and earlier allows local 64 bit PV guest administrators to cause a denial of service (host crash) via unspecified hypercalls that ignore virtual-address bits.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
kernel-0:2.6.18-274.3.1.el5
Fixed · RHSA-2011:1212
Red Hat Enterprise Linux 5.6 EUS - Server Only
kernel-0:2.6.18-238.31.1.el5
Fixed · RHSA-2011:1813
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-0:2.6.18-274.3.1.el5 | Fixed | RHSA-2011:1212 |
| Red Hat Enterprise Linux 5.6 EUS - Server Only | kernel-0:2.6.18-238.31.1.el5 | Fixed | RHSA-2011:1813 |
No package ranges for this CVE.
Remediation
Red Hat statement
The versions of the Linux kernel as shipped with Red Hat Enterprise Linux 4, 6, and Red Hat Enterprise MRG are not affected. This has been addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2011-1212.html.
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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.59% (0.00590) | 46.23th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.59% (0.00590) | 43.39th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.12% (0.00119) | 28.36th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.60th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.06% (0.00062) | 26.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00062) | 24.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Feb 13, 2023 | 0.95% (0.00950) | 31.86th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.10% (0.01104) | 53.31th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.95% (0.00950) | 30.63th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00950) | 28.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
References (8)
- http://rhn.redhat.com/errata/RHSA-2011-1212.html vendor-advisoryx_refsource_REDHAT
- http://secunia.com/advisories/55082 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-201309-24.xml vendor-advisoryx_refsource_GENTOO
- http://www.openwall.com/lists/oss-security/2011/09/02/2 mailing-listx_refsource_MLIST
- https://access.redhat.com/security/cve/CVE-2011-2901 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=728042 x_refsource_CONFIRMIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-2901
- https://www.cve.org/CVERecord?id=CVE-2011-2901
| Link | Providers | Tags |
|---|---|---|
| http://rhn.redhat.com/errata/RHSA-2011-1212.html | vendor-advisoryx_refsource_REDHAT | |
| http://secunia.com/advisories/55082 | third-party-advisoryx_refsource_SECUNIA | |
| http://security.gentoo.org/glsa/glsa-201309-24.xml | vendor-advisoryx_refsource_GENTOO | |
| http://www.openwall.com/lists/oss-security/2011/09/02/2 | mailing-listx_refsource_MLIST | |
| https://access.redhat.com/security/cve/CVE-2011-2901 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=728042 | x_refsource_CONFIRMIssue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-2901 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-2901 |
Change history (0)
No recorded changes yet.