Is CVE-2021-43395 actively exploited?

CVE-2021-43395 has no public evidence of in-the-wild exploitation as of 2025-04-14.

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

CVE-2021-43395 has a CVSS score of 5.5 (MEDIUM severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2021-43395?

Patch guidance is available from illumos security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-43395.

CVE-2021-43395 - remediation guidance & executive summary

Q: Which products are affected by CVE-2021-43395?

6 products: illumos illumos, omniosce omnios, openindiana openindiana, joyent smartos, oracle solaris, and 1 more.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector: local
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-667 CWE-667

Metadata

Primary Vendor: ILLUMOS
Published: 12/26/2022
Last Modified: 4/14/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

illumos : illumosomniosce : omniosopenindiana : openindianajoyent : smartosoracle : solarisoracle : solaris

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-43395. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-43395

View on NIST NVD

CVE-2021-43395 vulnerability