CVE-2021-0089

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

6.5 (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:C/C:H/I:N/A:N

NVD analysis status

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

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2021-06-09 19:07Z5 YR AGO

Last updated

2024-08-03 15:25Z2 YR AGO

Reserved

2020-10-22

Assigning CNA

intel

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-203Observable DiscrepancyBase

Data version

5.1

Document digest

2b23df3f69e18046422cb1d1a4145933ab4ea236fc1f10b1ac94312d6bcbe3b3

• www.intel.comhttps://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00516.htmlx_refsource_MISC
• www.openwall.com[oss-security] 20210610 Xen Security Advisory 375 v4 (CVE-2021-0089,CVE-2021-26313) - Speculative Code Store Bypasshttp://www.openwall.com/lists/oss-security/2021/06/10/1mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20210610 Re: Xen Security Advisory 375 v3 (CVE-2021-0089,CVE-2021-26313) - Speculative Code Store Bypasshttp://www.openwall.com/lists/oss-security/2021/06/10/10mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20210610 Re: Xen Security Advisory 375 v3 (CVE-2021-0089,CVE-2021-26313) - Speculative Code Store Bypasshttp://www.openwall.com/lists/oss-security/2021/06/10/11mailing-listx_refsource_MLIST
• www.debian.orgDSA-4931https://www.debian.org/security/2021/dsa-4931vendor-advisoryx_refsource_DEBIAN
• lists.fedoraproject.orgFEDORA-2021-41d4347447https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H36U6CNREC436W6GYO7QUMJIVEA35SCV/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-993693c914https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVA2NY26MMXOODUMYZN5DCU3FXMBMBOB/vendor-advisoryx_refsource_FEDORA
• security.gentoo.orgGLSA-202107-30https://security.gentoo.org/glsa/202107-30vendor-advisoryx_refsource_GENTOO