Quick answers
- Is CVE-2026-91253 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-91253 being exploited in the wild.
- How severe is CVE-2026-91253?
- High severity, with a CVSS score of 7.8, published 20 October 2026.
- Which products and versions are affected?
- Oracle Solaris 11.4.
- Is there a fix for CVE-2026-91253?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-91253 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-91253?
- Check whether you run Oracle Solaris at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A local privilege escalation vulnerability in the Oracle Solaris kernel allows a low-privileged authenticated attacker to gain complete system compromise. The attack requires logon access to the target system with low privileges, and successful exploitation results in arbitrary code execution with kernel-level capabilities. No user interaction is required beyond the initial local authentication.
Affected products
- Oracle Solaris 11.4
Timeline
- 2026-10-20: disclosed