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CVE Record

CVE-2021-2192: Vulnerability in the Oracle Solaris product of Oracle Systems (component: Kernel).

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Kernel). The supported version that is affected is 11. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Solaris as well as unauthorized update, insert or delete access to some of Oracle Solaris accessible data. Note: This vulnerability applies to Oracle Solaris on SPARC systems only. CVSS 3.1 Base Score 6.1 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H).

MediumCVSS 6.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-2192 affects Oracle Solaris 11 on SPARC systems. A logged-in low-privileged user could disrupt the system with hangs or repeatable crashes and make limited unauthorized changes to Solaris-accessible data. This is not a remote internet exploit, but it matters for shared, regulated, or mission-critical Solaris hosts.

Executive priority

Treat as a targeted operational resilience issue, not an internet-wide emergency. Prioritize affected Solaris 11 SPARC systems that support critical services or allow multiple local users, then verify Oracle patch guidance and local access controls.

Technical view

Oracle describes a Kernel vulnerability in Solaris 11, SPARC only. CVSS 3.1 is 6.1 with AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H. The attacker needs local logon and low privileges. Successful exploitation can cause complete denial of service and limited integrity impact, with no stated confidentiality impact.

Likely exposure

Exposure is likely limited to organizations still running Oracle Solaris 11 on SPARC hardware, especially multi-user servers or hosts where untrusted users have shell or application-level local access. Solaris on non-SPARC systems is not identified as affected in the provided source bundle.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires local access with low privileges and no user interaction. Business risk is mainly service outage and limited unauthorized data modification on affected Solaris hosts.

Researcher notes

No CWE or CPE details were provided. Scope is local, low-complexity, low-privilege, no UI, unchanged scope, with integrity-low and availability-high impacts. Evidence is insufficient to claim exploitation in the wild or to name a specific patch level beyond Oracle CPU guidance.

Mitigation direction

  • Identify Solaris 11 systems running on SPARC hardware.
  • Review Oracle April 2021 Critical Patch Update guidance for Solaris.
  • Apply vendor-provided Solaris updates where applicable.
  • Restrict local logon access to trusted users only.
  • Prioritize mission-critical or shared Solaris SPARC hosts first.

Validation and detection

  • Inventory Solaris version and hardware architecture across the estate.
  • Confirm whether each Solaris 11 host is SPARC-based.
  • Check patch status against Oracle April 2021 CPU guidance.
  • Review local user access on affected Solaris hosts.
  • Monitor affected hosts for unexplained hangs or repeatable crashes.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-2192 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.1CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H1.84.2Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.1Medium
CVSS 3.1 vector shape for CVE-2021-2192Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationSolaris Operating System11Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.