CVE-2026-90137 Linux CVE debrief

Who should care

Linux kernel maintainers, Linux distribution maintainers, and users of Linux systems that include the hp-bioscfg component should assess their exposure and prioritize verification of affected systems.

Why it matters

CVE-2026-90137 is a HIGH-severity vulnerability in the Linux kernel's platform/x86: hp-bioscfg component. It allows for out-of-bounds reads when parsing ACPI packages, potentially leading to system crashes or information leaks. Linux kernel maintainers and users should assess exposure and prioritize verification of affected systems.

• Verify if running affected kernel versions and apply patches to prevent potential crashes or information leaks.
• Monitor system logs for unusual activity related to hp-bioscfg to detect potential exploitation attempts.
• Assess system exposure and prioritize patching or mitigation strategies to minimize potential impact.

Technical summary

The vulnerability is caused by a lack of proper bounds checking in the hp-bioscfg component of the Linux kernel. When parsing ACPI packages, the code reads from the password_obj array without ensuring that the index is within bounds. This can lead to out-of-bounds reads and potentially crash the system or leak sensitive information. The issue has been resolved in later kernel versions, and users are advised to review and apply kernel updates to ensure the latest security patches are installed. The vulnerability has a CVSS score of 7.7 and is considered HIGH severity.

Defensive priority

Linux kernel maintainers and users should assess exposure and prioritize verification of affected systems.

Recommended defensive actions

• Review and apply kernel updates to ensure the latest security patches are installed.
• Assess system exposure and verify if running affected kernel versions.
• Monitor system logs for unusual activity related to hp-bioscfg.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 7.7 and HIGH severity. The issue is resolved in later kernel versions. Evidence is limited to CVE Program and NVD sources. Defenders should verify affected system deployments, review official advisories, and plan for vendor-supported updates or mitigations. Compensating controls and monitoring may be necessary for exposed systems.

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.