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CVE Record

CVE-2021-35589: Vulnerability in the Oracle Solaris product of Oracle Systems (component: Device drivers).

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Device drivers). The supported version that is affected is 11. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle Solaris executes to compromise Oracle Solaris. While the vulnerability is in Oracle Solaris, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Solaris. CVSS 3.1 Base Score 6.0 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H).

MediumCVSS 6Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-35589 is an Oracle Solaris 11 device-driver vulnerability that can let a highly privileged logged-in attacker crash or hang the system. The business impact is availability loss, not data theft. It matters most for organizations still running Solaris 11 for critical workloads.

Executive priority

Treat as a targeted availability risk for Solaris-dependent operations. Prioritize patch verification where Solaris 11 supports critical services, but this is not described as remotely exploitable or actively exploited in the provided evidence.

Technical view

Oracle describes a Solaris device-driver issue affecting supported Solaris 11. The CVSS 3.1 score is 6.0 with local access, low complexity, high privileges required, no user interaction, changed scope, and high availability impact only.

Likely exposure

Exposure is likely limited to Oracle Solaris 11 systems where attackers or untrusted administrators can obtain high-privileged local logon. Internet-facing exposure is not indicated by the provided sources.

Exploitation context

The source bundle does not show CISA KEV listing or cited active exploitation. Exploitation requires local access and high privileges, so the main concern is abuse after compromise or by an insider with elevated access.

Researcher notes

No CWE, specific driver name, patch identifier, or public exploit details are provided in the bundle. The changed-scope CVSS flag suggests possible impact beyond the vulnerable Solaris component, but the sources do not identify those dependent products.

Mitigation direction

  • Review Oracle's October 2021 Critical Patch Update for Solaris guidance.
  • Apply Oracle-supported Solaris 11 security updates after operational testing.
  • Limit high-privileged local logon to trusted administrators only.
  • Monitor Solaris systems for unexplained hangs or repeatable crashes.
  • Confirm dependent products are assessed where Solaris availability affects them.

Validation and detection

  • Inventory all Oracle Solaris 11 hosts and their patch levels.
  • Compare installed Solaris updates against Oracle's October 2021 CPU guidance.
  • Review privileged account access paths for unnecessary local logon rights.
  • Check logs and monitoring for recurring crashes or availability incidents.
  • Confirm business owners know which services depend on affected Solaris hosts.
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-2021-35589 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 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/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
6CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H1.54Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6Medium
CVSS 3.1 vector shape for CVE-2021-35589Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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