CVE-2026-98411 Linux CVE debrief

Who should care

Linux kernel maintainers, users, and administrators should assess exposure and prioritize patching to prevent potential NULL-pointer dereferences. This includes reviewing the Linux kernel power sequencing code, verifying affected versions, and applying patches from Linux kernel maintainers. Additionally, monitoring Linux kernel updates and advisories is crucial for potential impact. Operators, platform administrators, and security teams should also beaware

Why it matters

CVE-2026-98411 is a NULL-pointer dereference vulnerability in the Linux kernel's power sequencing code. Linux kernel maintainers and users should assess exposure and prioritize patching to prevent potential system crashes or instability.

• Potential system crashes or instability due to NULL-pointer dereferences
• Need for verification of affected versions and application of patches
• Importance of monitoring Linux kernel updates and advisories

Technical summary

The Linux kernel's power sequencing code has a NULL-pointer dereference vulnerability in the `pwrseq_device_register()` function. When `dev_set_name()` fails, the code jumps to the `err_put_pwrseq` label before initializing `pwrseq->targets`, potentially causing a NULL-pointer dereference in `pwrseq_release()`. This issue can lead to system crashes or instability if exploited. Linux kernel maintainers and users should assess exposure and prioritize patching to prevent potential NULL-pointer dereferences. The vulnerability

Defensive priority

Linux kernel maintainers and users should assess exposure and prioritize patching.

Recommended defensive actions

• Review Linux kernel power sequencing code for exposure to CVE-2026-98411
• Verify affected versions and apply patches from Linux kernel maintainers
• Monitor Linux kernel updates and advisories for potential impact
• 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 source item provide details on the vulnerability in the Linux kernel's power sequencing code, specifically a NULL-pointer dereference in the `pwrseq_device_register()` function. Affected versions and exploitation status require verification from official Linux kernel sources. The issue occurs when `dev_set_name()` fails, causing a jump to the `err_put_pwrseq` label before initializing `pwrseq->targets`, potentially leading to a NULL-pointer dereference in `pwrseq_release()`. Linux kernel maintainers and users should

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.