CVE-2026-91255: High severity Oracle Solaris vulnerability
Vulnerability in the Oracle Solaris product of Oracle Systems (component: Kernel). The supported version that is affected is 11.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP 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. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Affected Software
Event History
Frequently Asked Questions
Which systems are exposed to this issue?
Oracle Solaris 11.4 is identified as the affected supported version. Exposure requires network access to the affected system over HTTP.
Does exploitation require authentication or user interaction?
No. The vulnerability is described as easily exploitable by an unauthenticated attacker, and it requires no user interaction.
What is the likely impact of a successful attack?
A successful attack can cause Oracle Solaris to hang or crash repeatedly, resulting in a complete denial of service. The provided CVSS vector indicates no confidentiality or integrity impact.