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Security Bulletin: A vulnerability has been identified in IBM Spectrum Scale where an unprivileged user to cause denial of service in kernel ( CVE-2020-4411)

Security Bulletin


A security vulnerability has been identified in all levels of IBM Spectrum Scale that could allow a local attacker to cause a denial of service. A fix for this vulnerability is available.

Vulnerability Details

CVEID:   CVE-2020-4411
DESCRIPTION:   The Spectrum Scale file system component is affected by a denial of service vulnerability in its kernel module that could allow an attacker to cause a denial of service condition on the affected system. To exploit this vulnerability, a local attacker could invoke a subset of ioctls on the Spectrum Scale device with non-valid arguments. This could allow the attacker to crash the kernel.
CVSS Base score: 7.1
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)

Affected Products and Versions

IBM Spectrum Scale V5.0.0.0 through V5.0.4.3

IBM Spectrum Scale V4.2.0.0 through V4.2.3.21


For IBM Spectrum Scale V5.0.0.0 through, apply V5.0.4.4 available from FixCentral at:

For IBM Spectrum Scale V4.2.0.0 thru V4.2.3.21, apply V4.2.3.22 available from FixCentral at:

If you cannot apply the latest level of service, contact IBM Service for an efix:

- For IBM Spectrum Scale V5.0.0.0 thru V5.0.4.3, reference APAR IJ23784
- For IBM Spectrum Scale V4.2.0.0 thru V4.2.3.21, reference APAR IJ23757

Workarounds and Mitigations


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Change History

18 May 2020: Final version published.

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location


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Document Information

Modified date:
18 May 2020