CVE-2020-27670

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 16.7% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-10-22 20:34Z6 YR AGO

Last updated

2024-08-04 16:18Z2 YR AGO

Reserved

2020-10-22

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-345Insufficient Verification of Data AuthenticityClass
• CWE-567Unsynchronized Access to Shared Data in a Multithreaded ContextBase

Data version

5.1

Document digest

1e9b2d54ebf12fd8d29d2b6251fdc301fd1eedc517feb382cca08a7bce0b745e

• xenbits.xen.orghttp://xenbits.xen.org/xsa/advisory-347.htmlx_refsource_CONFIRM
• xenbits.xen.orghttps://xenbits.xen.org/xsa/advisory-347.htmlx_refsource_MISC
• lists.opensuse.orgopenSUSE-SU-2020:1783http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.htmlvendor-advisoryx_refsource_SUSE
• lists.opensuse.orgopenSUSE-SU-2020:1844http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.htmlvendor-advisoryx_refsource_SUSE
• security.gentoo.orgGLSA-202011-06https://security.gentoo.org/glsa/202011-06vendor-advisoryx_refsource_GENTOO
• lists.fedoraproject.orgFEDORA-2020-6dd36a716chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/vendor-advisoryx_refsource_FEDORA
• www.debian.orgDSA-4804https://www.debian.org/security/2020/dsa-4804vendor-advisoryx_refsource_DEBIAN
• www.openwall.com[oss-security] 20210119 Xen Security Advisory 347 v3 (CVE-2020-27670) - unsafe AMD IOMMU page table updateshttp://www.openwall.com/lists/oss-security/2021/01/19/9mailing-listx_refsource_MLIST