xen: Off-by-one error in FLASK_AVC_CACHESTAT hypercall (xsa-85)
Published Apr 1, 2014
5.8
MEDIUMCVSS 2.0
EPSS 0.53%
Description
Off-by-one error in the flask_security_avc_cachestats function in xsm/flask/flask_op.c in Xen 4.2.x and 4.3.x, when the maximum number of physical CPUs are in use, allows local users to cause a denial of service (host crash) or obtain sensitive information from hypervisor memory by leveraging a FLASK_AVC_CACHESTAT hypercall, which triggers a buffer over-read.
Affected products
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5. This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG 2 as we did not have support for Xen hypervisor.
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:M/Au:S/C:P/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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.53% (0.00525) | 42.43th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.53% (0.00525) | 40.12th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.11% (0.00111) | 27.13th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | 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 (10)
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00011.html vendor-advisoryx_refsource_SUSE
- http://seclists.org/oss-sec/2014/q1/263
- http://security.gentoo.org/glsa/glsa-201407-03.xml vendor-advisoryx_refsource_GENTOO
- http://www.openwall.com/lists/oss-security/2014/02/07/12 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2014/02/10/6 mailing-listx_refsource_MLIST
- http://xenbits.xen.org/xsa/advisory-85.html x_refsource_CONFIRMPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2014-1895 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1062329 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2014-1895
- https://www.cve.org/CVERecord?id=CVE-2014-1895
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00011.html | vendor-advisoryx_refsource_SUSE | |
| http://seclists.org/oss-sec/2014/q1/263 | ||
| http://security.gentoo.org/glsa/glsa-201407-03.xml | vendor-advisoryx_refsource_GENTOO | |
| http://www.openwall.com/lists/oss-security/2014/02/07/12 | mailing-listx_refsource_MLIST | |
| http://www.openwall.com/lists/oss-security/2014/02/10/6 | mailing-listx_refsource_MLIST | |
| http://xenbits.xen.org/xsa/advisory-85.html | x_refsource_CONFIRMPatchVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2014-1895 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1062329 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2014-1895 | ||
| https://www.cve.org/CVERecord?id=CVE-2014-1895 |
Change history (0)
No recorded changes yet.