CVE-2021-28694

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

0.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 31.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-08-27 18:46Z5 YR AGO

Last updated

2024-08-03 21:47Z2 YR AGO

Reserved

2021-03-18

Assigning CNA

XEN

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

No CWE assigned

Data version

5.1

Document digest

c605cb94694238cce78a061f4eeb92aaacb46ba9aaf355b6aee0e9d415db6d31

• xenbits.xenproject.orghttps://xenbits.xenproject.org/xsa/advisory-378.txtx_refsource_MISC
• www.openwall.com[oss-security] 20210901 Xen Security Advisory 378 v3 (CVE-2021-28694,CVE-2021-28695,CVE-2021-28696) - IOMMU page mapping issues on x86http://www.openwall.com/lists/oss-security/2021/09/01/1mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20210901 Re: Xen Security Advisory 378 v3 (CVE-2021-28694,CVE-2021-28695,CVE-2021-28696) - IOMMU page mapping issues on x86http://www.openwall.com/lists/oss-security/2021/09/01/5mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20210901 Re: Xen Security Advisory 378 v3 (CVE-2021-28694,CVE-2021-28695,CVE-2021-28696) - IOMMU page mapping issues on x86http://www.openwall.com/lists/oss-security/2021/09/01/6mailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2021-4f129cc0c1https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPRVHW4J4ZCPPOHZEWP5MOJT7XDGFFPJ/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-d68ed12e46https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZCNPSRPGFCQRYE2BI4D4Q4SCE56ANV2/vendor-advisoryx_refsource_FEDORA
• www.debian.orgDSA-4977https://www.debian.org/security/2021/dsa-4977vendor-advisoryx_refsource_DEBIAN
• lists.fedoraproject.orgFEDORA-2021-081f9bf5d2https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2VQCFAPBNGBBAOMJZG6QBREOG5IIDZID/vendor-advisoryx_refsource_FEDORA
• security.gentoo.orgGLSA-202208-23https://security.gentoo.org/glsa/202208-23vendor-advisoryx_refsource_GENTOO