xen: Host crash when preempting a multicall on ARM
Published Nov 17, 2015
4.9
MEDIUMCVSS 2.0
EPSS 0.40%
Description
The hypercall_create_continuation function in arch/arm/domain.c in Xen 4.4.x through 4.6.x allows local guest users to cause a denial of service (host crash) via a preemptible hypercall to the multicall interface.
Affected products
No data.
No data.
Red Hat Enterprise Linux 5
xen
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | xen | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
On systems where the guest kernel is controlled by the host rather than guest administrator, running only kernels which do not make use of multicall functionality will prevent untrusted guest users from exploiting this issue. However untrusted guest administrators can still trigger it unless further steps are taken to prevent them from loading code into the kernel (e.g. by disabling loadable modules etc) or from using other mechanisms which allow them to run code at kernel privilege.
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:L/AC:L/Au:N/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 3, 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 3, 2026 | 0.40% (0.00395) | 31.41th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.40% (0.00395) | 31.09th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.11% (0.00108) | 26.60th | 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 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
References (11)
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html vendor-advisoryx_refsource_FEDORA
- http://www.debian.org/security/2015/dsa-3414 vendor-advisoryx_refsource_DEBIAN
- http://www.securitytracker.com/id/1034031 vdb-entryx_refsource_SECTRACK
- http://xenbits.xen.org/xsa/advisory-145.html x_refsource_CONFIRMPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2015-7812 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1271621 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-7812
- https://security.gentoo.org/glsa/201604-03 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2015-7812
| Link | Providers | Tags |
|---|---|---|
| http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.html | vendor-advisoryx_refsource_FEDORA | |
| http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html | vendor-advisoryx_refsource_FEDORA | |
| http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html | vendor-advisoryx_refsource_FEDORA | |
| http://www.debian.org/security/2015/dsa-3414 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securitytracker.com/id/1034031 | vdb-entryx_refsource_SECTRACK | |
| http://xenbits.xen.org/xsa/advisory-145.html | x_refsource_CONFIRMPatchVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2015-7812 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1271621 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-7812 | ||
| https://security.gentoo.org/glsa/201604-03 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2015-7812 |
Change history (0)
No recorded changes yet.