Is CVE-2021-28690 in the CISA KEV catalog?

No. CVE-2021-28690 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-28690?

CVE-2021-28690 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-28690?

CVE-2021-28690 has an EPSS score of 1.02% (59th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-28690?

Upgrade xen on debian 11 to 4.14.2+25-gb6a8c4f72d-1 or later.

CVE & CISA-KEV Catalog

CVE-2021-28690

MEDIUM

6.5

CVSS v3

NVD

Description

x86: TSX Async Abort protections not restored after S3 This issue relates to the TSX Async Abort speculative security vulnerability. Please see https://xenbits.xen.org/xsa/advisory-305.html for details. Mitigating TAA by disabling TSX (the default and preferred option) requires selecting a non-default setting in MSR_TSX_CTRL. This setting isn't restored after S3 suspend.

How to fix

Remediation Available

xenDebian

Fixed in:4.14.2+25-gb6a8c4f72d-1CVE-2021-28690

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.02%probability of exploitation in 30 days

59thpercentile

Moderate risk: more likely to be exploited than 59% of all known CVEs.

References

Patch1

xenbits.xenproject.org

Third-Party Advisory1

security.gentoo.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.