Ubuntu 24.04 LTS must disable kernel core dumps.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-270746	SRG-OS-000184-GPOS-00078	UBTU-24-600070	SV-270746r1155242_rule	2025-11-24	1

Description
Kernel core dumps may contain the full contents of system memory at the time of the crash. Kernel core dumps may consume a considerable amount of disk space and may result in denial of service by exhausting the available space on the target file system partition.

ℹ️ Check
Verify kernel core dumps are disabled unless needed with the following command: $ systemctl status kdump-tools.service o kdump-tools.service Loaded: masked (Reason: Unit kdump-tools.service is masked.) Active: inactive (dead) If kdump-tools is not installed the output will be: Unit kdump-tools.service could not be found. If "kdump-tools.service" is not masked and inactive, ask the system administrator (SA) if the use of the service is required and documented with the information system security officer (ISSO). If the service is active and is not documented, this is a finding.

ℹ️ Check

Verify kernel core dumps are disabled unless needed with the following command: $ systemctl status kdump-tools.service o kdump-tools.service Loaded: masked (Reason: Unit kdump-tools.service is masked.) Active: inactive (dead) If kdump-tools is not installed the output will be: Unit kdump-tools.service could not be found. If "kdump-tools.service" is not masked and inactive, ask the system administrator (SA) if the use of the service is required and documented with the information system security officer (ISSO). If the service is active and is not documented, this is a finding.

✔️ Fix
If kernel core dumps are not required, disable the "kdump-tools" service with the following command: $ sudo systemctl disable kdump-tools.service If kernel core dumps are required, document the need with the ISSO.