CVE-2025-27087

Local denial of service via undisclosed kernel flaw

Published Apr 22, 2025 · Updated Apr 23, 2025

Denial of service in the HPE Cray Operating System kernel before cos-base-3.2 allows local users to interrupt the system. HPE has not disclosed the kernel subsystem, triggering input, or resource operation responsible for the failure. Low-privileged local access is required; exploitation affects availability only, with no reported data exposure or modification.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the HPE Cray Operating System kernel before cos-base-3.2 allows local users to interrupt the system. HPE has not disclosed the kernel subsystem, triggering input, or resource operation responsible for the failure. Low-privileged local access is required; exploitation affects availability only, with no reported data exposure or modification.

The record

CVE
CVE-2025-27087
Published
Apr 22, 2025
Updated
Apr 23, 2025
Vendor
Hewlett Packard Enterprise (HPE)
Product
HPE Cray Operating System
Classifications
CWE-400, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <cos-base-3.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Hewlett Packard Enterprise (HPE) · HPE Cray Operating Systemversion=0 <cos-base-3.2

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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