Vulnerability Monitor

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CVE-2021-43395

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.5, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 5 products from illumos, from omniosce, from openindiana and 2 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2022, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2022-12-26T06:15:10.677

Last Modified

2025-04-14T16:15:17.767

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

Weaknesses

Type: Primary
CWE-667
Type: Secondary
CWE-667

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	illumos	illumos	< 2022-01-18	Yes
Operating System	omniosce	omnios	r151038	Yes
Operating System	openindiana	openindiana	hipster_2021.04	Yes
Operating System	joyent	smartos	20210923	Yes
Operating System	oracle	solaris	10	Yes
Operating System	oracle	solaris	11	Yes

References

http://www.tribblix.org/relnotes.html Release Notes, Third Party Advisory ([email protected])
https://github.com/illumos/illumos-gate/blob/069654420de4aade43c63c43cd2896e66945fc8a/usr/src/uts/common/fs/tmpfs/tmp_vnops.c Exploit, Third Party Advisory ([email protected])
https://github.com/illumos/illumos-gate/blob/b3403853e80914bd0aade9b5b605da4878078173/usr/src/uts/common/fs/tmpfs/tmp_dir.c Exploit, Third Party Advisory ([email protected])
https://github.com/illumos/illumos-gate/commit/f859e7171bb5db34321e45585839c6c3200ebb90 Patch, Third Party Advisory ([email protected])
https://illumos.topicbox.com/groups/developer/T1c9e4f27f8c2f959/security-heads-up-illumos14424 Vendor Advisory ([email protected])
https://jgardner100.wordpress.com/2022/01/20/security-heads-up/ Third Party Advisory ([email protected])
https://kebe.com/blog/?p=505 Third Party Advisory ([email protected])
https://www.illumos.org/issues/14424 Issue Tracking, Patch, Vendor Advisory ([email protected])
https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory ([email protected])
http://www.tribblix.org/relnotes.html Release Notes, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/illumos/illumos-gate/blob/069654420de4aade43c63c43cd2896e66945fc8a/usr/src/uts/common/fs/tmpfs/tmp_vnops.c Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/illumos/illumos-gate/blob/b3403853e80914bd0aade9b5b605da4878078173/usr/src/uts/common/fs/tmpfs/tmp_dir.c Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/illumos/illumos-gate/commit/f859e7171bb5db34321e45585839c6c3200ebb90 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://illumos.topicbox.com/groups/developer/T1c9e4f27f8c2f959/security-heads-up-illumos14424 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://jgardner100.wordpress.com/2022/01/20/security-heads-up/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://kebe.com/blog/?p=505 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.illumos.org/issues/14424 Issue Tracking, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.oracle.com/security-alerts/cpujan2022.html Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For illumos's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.