kernel: xen: x86_emulate: fix SAHF emulation
Published Dec 27, 2013
5.5
MEDIUMCVSS 2.0
EPSS 0.67%
Description
Xen in the Linux kernel, when running a guest on a host without hardware assisted paging (HAP), allows guest users to cause a denial of service (invalid pointer dereference and hypervisor crash) via the SAHF instruction.
Affected products
No data.
Configuration 2
- 5.0
- 5.0
- 5.0
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
Red Hat Enterprise Linux 4
kernel
Not affected
Red Hat Enterprise Linux 5
kernel-xen
Affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| 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 |
| Red Hat Enterprise Linux 4 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 5 | kernel-xen | Affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue only affects Red Hat Enterprise Linux 5. The versions of the Linux kernel-xen 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 | 0.67% (0.00671) | 50.19th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.68% (0.00676) | 47.23th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.11% (0.00110) | 26.99th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00059) | 26.93th | v3 (v2023.03.01) |
| May 25, 2024 | 0.06% (0.00059) | 24.81th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00059) | 22.80th | 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 | 1.03% (0.01034) | 40.96th | 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 (7)
- http://rhn.redhat.com/errata/RHSA-2011-1212.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.openwall.com/lists/oss-security/2011/08/30/1 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://xenbits.xen.org/hg/xen-3.1-testing.hg/rev/15644 x_refsource_MISCPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2011-2519 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=718882 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2011-2519
- https://www.cve.org/CVERecord?id=CVE-2011-2519
| Link | Providers | Tags |
|---|---|---|
| http://rhn.redhat.com/errata/RHSA-2011-1212.html | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2011/08/30/1 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://xenbits.xen.org/hg/xen-3.1-testing.hg/rev/15644 | x_refsource_MISCPatchVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2011-2519 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=718882 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-2519 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-2519 |
Change history (0)
No recorded changes yet.