kernel: xen: Missing privilege level checks in x86 emulation of software interrupts (XSA-106)
Published Oct 2, 2014
3.3
LOWCVSS 2.0
EPSS 0.85%
Description
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 3.3.x through 4.4.x does not check the supervisor mode permissions for instructions that generate software interrupts, which allows local HVM guest users to cause a denial of service (guest crash) via unspecified vectors.
Affected products
No data.
- 3.3.0
- 3.3.1
- 3.3.2
- 4.1.0
- 4.1.1
- 4.1.2
- 4.1.3
- 4.1.4
- 4.1.5
- 4.1.6.1
- 4.2.0
- 4.2.1
- 4.2.2
- 4.2.3
- 4.3.0
- 4.3.1
- 4.4.0
- 4.4.0
- 4.4.1
No data.
Red Hat Enterprise Linux 5
kernel-xen
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-xen | Not affected | n/a |
No package ranges for this CVE.
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.
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:N/C:N/I:N/A:P
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 | 0.85% (0.00849) | 56.61th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.85% (0.00849) | 53.17th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.40% (0.00398) | 58.50th | 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 (17)
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html vendor-advisoryx_refsource_SUSE
- http://secunia.com/advisories/61500 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/61858 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/61890 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-201412-42.xml vendor-advisoryx_refsource_GENTOO
- http://support.citrix.com/article/CTX200218 x_refsource_CONFIRM
- http://www.debian.org/security/2014/dsa-3041 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/70062 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1030889 vdb-entryx_refsource_SECTRACK
- http://xenbits.xen.org/xsa/advisory-106.html x_refsource_CONFIRMPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2014-7156 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1140271 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2014-7156
- https://www.cve.org/CVERecord?id=CVE-2014-7156
Change history (0)
No recorded changes yet.