STIGQter STIGQter: STIG Summary: Red Hat Enterprise Linux 10 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 01 Jul 2026:

RHEL 10 must clear the page allocator to prevent use-after-free attacks.

DISA Rule

SV-281302r1167056_rule

Vulnerability Number

V-281302

Group Title

SRG-OS-000134-GPOS-00068

Rule Version

RHEL-10-701000

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure RHEL 10 to enable page poisoning with the following commands:

$ sudo grubby --update-kernel=ALL --args="page_poison=1"

Check Contents

Verify RHEL 10 is configured so that the current GRUB 2 configuration enables page poisoning to mitigate use-after-free vulnerabilities.

Check that the current GRUB 2 configuration has page poisoning enabled with the following command:

$ sudo grubby --info=ALL | grep args | grep -v 'page_poison=1'

If any output is returned, this is a finding.

Check that page poisoning is enabled by default to persist in kernel updates with the following command:

$ sudo grep page_poison /etc/default/grub
GRUB_CMDLINE_LINUX="page_poison=1"

If "page_poison" is not set to "1", is missing or commented out, this is a finding.

Vulnerability Number

V-281302

Documentable

False

Rule Version

RHEL-10-701000

Severity Override Guidance

Verify RHEL 10 is configured so that the current GRUB 2 configuration enables page poisoning to mitigate use-after-free vulnerabilities.

Check that the current GRUB 2 configuration has page poisoning enabled with the following command:

$ sudo grubby --info=ALL | grep args | grep -v 'page_poison=1'

If any output is returned, this is a finding.

Check that page poisoning is enabled by default to persist in kernel updates with the following command:

$ sudo grep page_poison /etc/default/grub
GRUB_CMDLINE_LINUX="page_poison=1"

If "page_poison" is not set to "1", is missing or commented out, this is a finding.

Check Content Reference

M

Target Key

5733