Is CVE-2021-43395 in the CISA KEV catalog?

No. CVE-2021-43395 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-43395?

CVE-2021-43395 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-43395?

CVE-2021-43395 has an EPSS score of 0.32% (23th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-43395?

Upgrade illumos to 2022-01-18 or later.

CVE & CISA-KEV Catalog

CVE-2021-43395

MEDIUM

5.5

CVSS v3

NVD

Description

An issue was discovered in illumos before f859e7171bb5db34321e45585839c6c3200ebb90, OmniOS Community Edition r151038, OpenIndiana Hipster 2021.04, and SmartOS 20210923. A local unprivileged user can cause a deadlock and kernel panic via crafted rename and rmdir calls on tmpfs filesystems. Oracle Solaris 10 and 11 is also affected.

CWE-667

How to fix

Remediation Available

illumosNVD

Affected:< 2022-01-18Fixed in:2022-01-18CVE-2021-43395derived from NVD

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 VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.32%probability of exploitation in 30 days

23rdpercentile

Low risk: more likely to be exploited than 23% of all known CVEs.

References

Patch3

Exploit2

Vendor Advisory1

illumos.topicbox.com

Third-Party Advisory3

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Markdown

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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 2025-04-14.