CVE-2026-97456 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux-based system administrators, and security teams responsible for managing and securing Linux-based systems. These individuals should assess exposure, verify remediation, and ensure that their systems are updated with the latest security patches to prevent potential issues.

Why it matters

A vulnerability in the Linux kernel's ACPICA has been resolved. The condition check for AML_ELSE_OP in acpi_ps_parse_loop() has been fixed to prevent out-of-bounds access. Linux kernel developers and maintainers should assess exposure and verify remediation.

• Verify Linux kernel version and ACPICA configuration to prevent potential issues
• Assess impact on Linux-based systems and applications

Technical summary

The Linux kernel's ACPICA has a vulnerability in the acpi_ps_parse_loop() function. A condition check for AML_ELSE_OP has been fixed to prevent out-of-bounds access. This fix addresses a potential security issue that could have allowed for arbitrary code execution or denial of service attacks. The vulnerability was addressed by modifying the acpi_ps_parse_loop() function to correctly handle AML_ELSE_OP conditions, thereby preventing out-of-bounds access and ensuring the security and stability of Linux-based systems.

Defensive priority

Medium

Recommended defensive actions

• Review Linux kernel source code and ACPICA implementation for exposure
• Verify kernel version and ACPICA configuration
• Assess impact on Linux-based systems and applications
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD entry provide information on the vulnerability. However, the scope of affected systems and versions is not explicitly stated, requiring verification from official sources. The Linux kernel's ACPICA vulnerability has been addressed, but the specifics of affected deployments and configurations are not detailed in the CVE record or NVD entry. Users should review the official advisory and verify their system configurations to ensure they are not exposed.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.