xen: unsafe AMD IOMMU page table updates (XSA-347)
Published Oct 22, 2020
7.8
HIGHCVSS 3.1
EPSS 0.25%
Description
An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because an AMD IOMMU page-table entry can be half-updated.
Affected products
No data.
Configuration 3
- 31
Configuration 4
- 10.0
No data.
Red Hat Enterprise Linux 5
kernel-xen
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel-xen | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This flaw has been rated as having a security impact of Moderate, and is not currently planned to be addressed in future updates of Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in the Extended Life Phase of the support and maintenance life cycle. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Red Hat mitigation
Avoid passing through physical devices to untrusted guests.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:M/Au:N/C:C/I:C/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
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.25% (0.00254) | 15.34th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.25% (0.00251) | 16.15th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.03% (0.00033) | 6.33th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00045) | 16.02th | v3 (v2023.03.01) |
| Jun 10, 2024 | 0.04% (0.00045) | 14.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00045) | 12.06th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.10% (0.01104) | 52.45th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.10% (0.01104) | 50.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.41% (0.04411) | 70.76th | v2 (v2022.01.01) |
| Feb 3, 2022 | 9.61% (0.09608) | 87.22th | v1 |
| Jan 6, 2022 | 9.61% (0.09608) | 87.07th | v1 |
| Sep 1, 2021 | 2.31% (0.02314) | 78.25th | v1 |
| Apr 14, 2021 | 2.31% (0.02314) | 0.00th | v1 |
References (12)
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/01/19/9 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://xenbits.xen.org/xsa/advisory-347.html x_refsource_CONFIRMPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2020-27670 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1891087 Issue Tracking
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2020-27670
- https://security.gentoo.org/glsa/202011-06 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2020-27670
- https://www.debian.org/security/2020/dsa-4804 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://xenbits.xen.org/xsa/advisory-347.html x_refsource_MISCPatchVendor Advisory
Change history (0)
No recorded changes yet.