STIGQter: STIG Summary: Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide Version: 1 Release: 7 Benchmark Date: 01 Jul 2026:

AlmaLinux OS 9 must automatically lock an account when three unsuccessful logon attempts occur during a 15-minute time period.

DISA Rule

SV-269149r1184091_rule

Vulnerability Number

V-269149

Group Title

SRG-OS-000021-GPOS-00005

Rule Version

ALMA-09-007720

Severity

CAT II

CCI(s)

• CCI-000044 - Enforce the organization-defined limit of consecutive invalid logon attempts by a user during the organization-defined time period.

Weight

10

Fix Recommendation

Configure AlmaLinux OS 9 to lock an account after a number of incorrect login attempts within 15 minutes using pam_faillock.

First, enable the feature using the following command:

$ authselect enable-feature with-faillock

Then, add or uncomment the following line in the "/etc/security/faillock.conf" file:

fail_interval = 900

Check Contents

Verify AlmaLinux OS 9 locks an account after three unsuccessful logon attempts within a period of 15 minutes with the following command:

$ grep fail_interval /etc/security/faillock.conf

fail_interval = 900

If the "fail_interval" option is not set to 900 or less (but not 0), the line is commented out, or the line is missing, this is a finding.

Vulnerability Number

V-269149

Documentable

False

Rule Version

ALMA-09-007720

Severity Override Guidance

Verify AlmaLinux OS 9 locks an account after three unsuccessful logon attempts within a period of 15 minutes with the following command:

$ grep fail_interval /etc/security/faillock.conf

fail_interval = 900

If the "fail_interval" option is not set to 900 or less (but not 0), the line is commented out, or the line is missing, this is a finding.

Check Content Reference

M

Target Key

5664