CVE-2026-91253: High severity Oracle Solaris vulnerability

Published Oct 20, 2026

Updated

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).

Affected Software

2 affected components

Oracle Solaris=11.4

Event History

Oct 20, 2026

CVE Published

via MITRE·09:24 PM

Data Sourced

via MITRE·09:24 PM

DescriptionSeverity

Data Sourced

via NVD·10:20 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

Who can exploit this vulnerability?

An attacker needs a low-privileged account and logon access to infrastructure running Oracle Solaris. The attack vector is local and does not require user interaction.

Which deployments are known to be affected?

The affected supported version identified is Oracle Solaris 11.4, specifically the Kernel component. The provided information does not identify any unaffected versions or configurations.

What is the potential impact of successful exploitation?

Successful exploitation can allow takeover of Oracle Solaris, with high impact to confidentiality, integrity, and availability.