Kernel Vulnerability in Oracle Solaris by Oracle Systems
CVE-2026-91255

7.5HIGH

Key Information:

Vendor

Oracle
Status
Oracle Solaris
Vendor
CVE Published:
20 October 2026

What is CVE-2026-91255?

A vulnerability exists in the Oracle Solaris operating system's Kernel component, allowing unauthenticated attackers with network access via HTTP to exploit the system. This vulnerability can lead to significant operational disruptions, such as causing the system to hang or crash repeatedly, effectively resulting in a complete Denial of Service. It is crucial for users of Oracle Solaris 11.4 to implement the necessary security patches to mitigate against potential exploits.

Affected Version(s)

Oracle Solaris 11.4

References

https://www.oracle.com/security-alerts/cpuoct2026.html
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.