CVE-2020-27674

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

0.35% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 29.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

Low. 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 20:33Z6 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-787Out-of-bounds WriteBase
• CWE-772Missing Release of Resource after Effective LifetimeBase

Data version

5.1

Document digest

eaa40676980bf32581da55f48aea32b823535f6c9ebc6ffc9463c947bc9b538e

• xenbits.xen.orghttps://xenbits.xen.org/xsa/advisory-286.htmlx_refsource_MISC
• security.gentoo.orgGLSA-202011-06https://security.gentoo.org/glsa/202011-06vendor-advisoryx_refsource_GENTOO
• lists.fedoraproject.orgFEDORA-2020-5398bfb466https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3U4LNKKXU4UP4Z5XP6TMIWSML3QODPE/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-ec84c1565bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PZAM3LYJ5TZLSSNL3KXFILM46QKVTOUA/vendor-advisoryx_refsource_FEDORA
• 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 286 v6 (CVE-2020-27674) - x86 PV guest INVLPG-like flushes may leave stale TLB entrieshttp://www.openwall.com/lists/oss-security/2021/01/19/5mailing-listx_refsource_MLIST