CVE-2022-21493

System hang or crash via undisclosed kernel flaw

Published Apr 19, 2022 · Updated Sep 24, 2024

Denial of service in the Oracle Solaris 11 kernel allows local users to cause a system hang or repeatable crash through local access. Oracle has not published the affected kernel locus or the operation it performs incorrectly on attacker-controlled input. Exploitation requires a low-privileged login and interaction by another person, and the resulting availability loss can extend beyond the Solaris instance.

CVSS severity5.9
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in the Oracle Solaris 11 kernel allows local users to cause a system hang or repeatable crash through local access. Oracle has not published the affected kernel locus or the operation it performs incorrectly on attacker-controlled input. Exploitation requires a low-privileged login and interaction by another person, and the resulting availability loss can extend beyond the Solaris instance.

The record

CVE
CVE-2022-21493
Published
Apr 19, 2022
Updated
Sep 24, 2024
Vendor
Oracle
Product
Oracle Solaris
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Oracle · Oracle Solarisversion=11

Published CVSS scores

5.9OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo