---
id: "CVE-2026-91244"
kind: "vulnerability"
aliases: ["CVE-2026-91244"]
title: "Oracle Solaris 11.4: local low-privilege user can crash the system"
severity: "medium"
cvss: 4.7
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "on-prem", "oracle", "solaris"]
not_affected_if: ["no-local-logins", "other-os"]
published_at: "2026-10-20T22:20:25+00:00"
first_seen_at: "2026-10-23T21:57:26+00:00"
updated_at: "2026-10-25T04:35:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91244", "first_seen_at": "2026-10-23T21:57:26+00:00"}]
---

# Oracle Solaris 11.4: local low-privilege user can crash the system

A local user with a logon on a Solaris 11.4 host can trigger a hang or repeatable crash of the operating system's Services component. The sources describe only a denial of service, with no code execution or data exposure.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the release with `pkg info entire` or `uname -v` on each Solaris host.
- Confirm the host runs Solaris 11.4 as listed in the advisory.

## Fix

- Apply the Oracle Solaris 11.4 security update that addresses CVE-2026-91244 via `pkg update` from the Oracle support repository.
- Check the Oracle Critical Patch Update advisory for the exact SRU number; unknown in the sources.

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91244

## From the sources

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Services).   The supported version that is affected is 11.4. Difficult to exploit 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 unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Solaris. CVSS 3.1 Base Score 4.7 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H).

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