CVE-2026-91253

Analyzed Analyzed - Analysis Complete

Privilege Escalation in Oracle Solaris Kernel

Publication date: 2026-10-20

Last updated on: 2026-11-09

Assigner: Oracle

Description

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Kernel). The supported version that is affected is 11.4. 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 takeover of Oracle Solaris. CVSS 3.1 Base Score 7.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

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Meta Information

Published

2026-10-20

Last Modified

2026-11-09

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91253

EUVD

EUVD-2026-106508

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	solaris	11.4

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-269	The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Solaris 11.4 Kernel that allows a low-privileged attacker with local access to compromise the system. Successful exploitation could lead to complete takeover of the Oracle Solaris environment.

Impact Analysis

If you use Oracle Solaris 11.4, an attacker with local access could gain full control of your system, potentially accessing, modifying, or deleting sensitive data, disrupting services, or installing malware.

Compliance Impact

This vulnerability allows low privileged attackers to compromise Oracle Solaris, potentially leading to unauthorized access, data breaches, or system takeover. Such impacts could violate compliance requirements under GDPR (data protection), HIPAA (healthcare data security), and other regulations by exposing sensitive information or disrupting critical operations.

Mitigation Strategies

Apply the latest Oracle Solaris patches from Oracle immediately to address the kernel vulnerability. Ensure only trusted users have logon access to systems running Oracle Solaris 11.4.

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