STIGQter: STIG Summary: IBM z/OS ACF2 Security Technical Implementation Guide Version: 9 Release: 9 Benchmark Date: 01 Jul 2026:

ACF2 RESVOLS GSO record value must be set to Volmask(-). Any other setting requires documentation justifying the change.

DISA Rule

SV-223513r1225743_rule

Vulnerability Number

V-223513

Group Title

SRG-OS-000185-GPOS-00079

Rule Version

ACF2-ES-000960

Severity

CAT II

CCI(s)

• CCI-000368 - Document any deviations from the established configuration settings for organization-defined system components based on organization-defined operational requirements.
• CCI-001199 - Protects the confidentiality and/or integrity of organization-defined information at rest.

Weight

10

Fix Recommendation

Define the GSO RESVOLS record values to conform to the following requirements.

VOLMASK(-)

Example:
SET C(GSO)
INSERT RESVOLS VOLMASK(-)

F ACF2,REFRESH(SECVOLS)

Check Contents

From an ACF command screen, enter:
SET CONTROL(GSO)
LIST RESVOLS

If the GSO RESVOLS record values conform to the following requirements, this is not a finding.

VOLMASK(-)

NOTE: Local changes will be documented in writing with supporting documentation.

If there is any deviation from the above requirements in the GSO RESVOLS record values, this is a finding.

Vulnerability Number

V-223513

Documentable

False

Rule Version

ACF2-ES-000960

Severity Override Guidance

From an ACF command screen, enter:
SET CONTROL(GSO)
LIST RESVOLS

If the GSO RESVOLS record values conform to the following requirements, this is not a finding.

VOLMASK(-)

NOTE: Local changes will be documented in writing with supporting documentation.

If there is any deviation from the above requirements in the GSO RESVOLS record values, this is a finding.

Check Content Reference

M

Target Key

4100