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

AlmaLinux OS 9 local disk partitions must implement cryptographic mechanisms to prevent unauthorized disclosure or modification of all information that requires at rest protection.

DISA Rule

SV-269429r1050312_rule

Vulnerability Number

V-269429

Group Title

SRG-OS-000405-GPOS-00184

Rule Version

ALMA-09-041600

Severity

CAT I

CCI(s)

CCI-002476 - Implement cryptographic mechanisms to prevent unauthorized disclosure of organization-defined information at rest on organization-defined system components.
CCI-002475 - Implement cryptographic mechanisms to prevent unauthorized modification of organization-defined information when at rest on organization-defined system components.
CCI-001199 - Protects the confidentiality and/or integrity of organization-defined information at rest.

Weight

Fix Recommendation

Configure AlmaLinux OS 9 to prevent unauthorized modification of all information at rest by using disk encryption.

Encrypting a partition in an already installed system is more difficult, because existing partitions will need to be resized and changed.

To encrypt an entire partition, dedicate a partition for encryption in the partition layout.

Check Contents

Note: If there is a documented and approved reason for not having data-at-rest encryption at the operating system level, such as encryption provided by a hypervisor or a disk storage array in a virtualized environment, this requirement is Not Applicable.

Verify AlmaLinux OS 9 prevents unauthorized disclosure or modification of all information requiring at-rest protection by using disk encryption.

Verify all system partitions are encrypted with the following command:

$ lsblk -e11 -oNAME,FSTYPE,FSVER,MOUNTPOINTS

NAME FSTYPE FSVER MOUNTPOINTS
sda
+-sda1 vfat FAT16 /boot/efi
+-sda2 xfs /boot
+-sda3 LVM2_member LVM2 001
+-rootvg-root crypto_LUKS 2
¦ +-luks-8a7154ec-8eeb-46c8-9d75-66fc4b81d665 xfs /
+-rootvg-swap crypto_LUKS 2
¦ +-luks-89bf0df8-547f-4613-af07-215e5f63e9a9 swap 1 [SWAP]
+-rootvg-home crypto_LUKS 2
¦ +-luks-10a20c46-483d-4d12-831f-5328eda28fd1 xfs /home
+-rootvg-varlogaudit crypto_LUKS 2
¦ +-luks-29b74747-2f82-4472-82f5-0b5eb764effc xfs /var/log/audit
+-rootvg-varlog crypto_LUKS 2
¦ +-luks-e0d162f5-fad8-463e-8e39-6bd09e682961 xfs /var/log
+-rootvg-vartmp crypto_LUKS 2
¦ +-luks-0e7206e7-bfb1-4a23-ae14-b9cea7cf46d5 xfs /var/tmp
+-rootvg-var crypto_LUKS 2
+-luks-b23d8276-7844-4e79-8a58-505150b4eb42 xfs /var

Every persistent disk partition present must be of type "crypto_LUKS". If any partitions other than the /boot partitions are not type "crypto_LUKS", ask the administrator to indicate how the partitions are encrypted. If there is no evidence that these partitions are encrypted, this is a finding.

Vulnerability Number

V-269429

Documentable

False

Rule Version

ALMA-09-041600

Severity Override Guidance

Check Content Reference

Target Key

5664