CVE-2019-9579: An issue was discovered in Illumos in Nexenta NexentaStor 4.0.5 and 5.1.2, and other products

This month

HIGH 8.1MITIGATEMITIGATE

CVE-2019-9579 is a high-severity flaw (CVSS 8.1) affecting illumos, solaris. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Illumos in Nexenta NexentaStor 4.0.5 and 5.1.2, and other products. The SMB server allows an attacker to have unintended access, e.g., an attacker with WRITE_XATTR can change permissions. This occurs because of a combination of three factors: ZFS extended attributes are used to implement NT named streams, the SMB protocol requires implementations to have open handle semantics similar to those of NTFS, and the SMB server

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-276
Published	2022-12-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: illumos · oracle

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-12-26 20:15 UTCPublished CVE record published
2026-06-17 02:43 UTCUpdated Record last modified

illumos illumos MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy illumos || rpm -q illumos || illumos --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

oracle solaris MITIGATE

Affected: 11

Fixed in: no fixed release known

Safe to downgrade to: a release before 11

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-9579?

illumos: mitigate or apply the listed mitigation; solaris: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-9579 being exploited?

CVE-2019-9579 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-9579 affect?

CVE-2019-9579 affects illumos, solaris. Severity is high (CVSS 8.1). An issue was discovered in Illumos in Nexenta NexentaStor 4.0.5 and 5.1.2, and other products. The SMB server allows an attacker to have unintended access, e.g., an attacker with WRITE_XATTR can change permissions. This occurs because of a

How urgent is CVE-2019-9579?

Priority 40/100. High severity

Related CVEs

CVE-2021-43395 MEDIUM 5.5 UPGRADE MITIGATE An issue was discovered in illumos before f859e7171bb5db34321e45585839c6c3200ebb90, OmniOS Community Edition r

References

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