xen: paravirtualized drivers incautious about shared memory contents (XSA-155)
Published Apr 14, 2016
8.2
HIGHCVSS 3.0
EPSS 1.08%
Description
Xen, when used on a system providing PV backends, allows local guest OS administrators to cause a denial of service (host OS crash) or gain privileges by writing to memory shared between the frontend and backend, aka a double fetch vulnerability.
Affected products
No data.
Configuration 2
No data.
Red Hat Enterprise Linux 5
kernel-xen
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-xen | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
AV:L/AC:L/Au:S/C:P/I:P/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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.08% (0.01080) | 63.85th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.08% (0.01080) | 60.63th | v5 (v2026.06.15) |
| Apr 21, 2025 | 15.96% (0.15964) | 94.35th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.68% (0.04676) | 88.32th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.82% (0.07821) | 86.36th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.68% (0.04676) | 88.61th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.07% (0.00067) | 31.66th | v3 (v2023.03.01) |
| Jun 12, 2024 | 0.07% (0.00067) | 29.46th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00067) | 27.44th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
References (15)
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html vendor-advisoryx_refsource_SUSEThird Party Advisory
- http://www.debian.org/security/2016/dsa-3434 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2016/dsa-3471 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2016/dsa-3519 vendor-advisoryx_refsource_DEBIAN
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/79592 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1034479 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://xenbits.xen.org/xsa/advisory-155.html x_refsource_CONFIRMVendor Advisory
- https://access.redhat.com/security/cve/CVE-2015-8550 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1289125 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-8550
- https://security.gentoo.org/glsa/201604-03 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2015-8550
Change history (0)
No recorded changes yet.