CVE-2022-21439

Privileged kernel hang or repeated crash

Published Jul 19, 2022 · Updated Sep 24, 2024

Denial of service in the Oracle Solaris 10 and 11 kernel allows local users with high privileges to hang or repeatedly crash the system. Oracle has not disclosed the exact kernel locus or the operation that mishandles attacker-controlled input. Exploitation requires another person's interaction, and the reported consequence is limited to loss of system availability.

CVSS severity4.2
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Oracle Solaris 10 and 11 kernel allows local users with high privileges to hang or repeatedly crash the system. Oracle has not disclosed the exact kernel locus or the operation that mishandles attacker-controlled input. Exploitation requires another person's interaction, and the reported consequence is limited to loss of system availability.

The record

CVE
CVE-2022-21439
Published
Jul 19, 2022
Updated
Sep 24, 2024
Vendor
Oracle
Product
Oracle Solaris
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 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

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Is a vulnerable build present?

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

  1. Affected versionversion=10
  2. Affected versionversion=11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Oracle · Oracle Solarisversion=10; version=11

Published CVSS scores

4.2OracleCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application 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

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Your stack

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