CVE-2026-89461 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, system administrators responsible for kernel updates, and security teams overseeing vulnerability management and patch deployment. These stakeholders must work together to verify kernel versions, apply necessary updates, and review system configurations to ensure the fix is properly implemented and potential impacts are mitigated.

Why it matters

The Linux kernel vulnerability affects the power: supply: max17040 component, requiring verification and potential updates to prevent issues.

• Verify kernel version and apply updates to prevent potential issues
• Review system configurations for power: supply: max17040 component to ensure proper functionality

Technical summary

The Linux kernel vulnerability affects the power: supply: max17040 component. The issue involves synchronizing work cancellation on suspend to prevent the polling callback from continuing to access the fuel gauge and requeue itself after the suspend callback returns. This vulnerability can lead to system instability if not properly addressed through kernel updates or other mitigations. The fix involves using cancel_delayed_work_sync() to ensure that polling is quiesced before suspend completes, thereby preventing potential issues with the fuel gauge and requeueing.

Defensive priority

Verify and apply kernel updates to ensure the fix is deployed.

Recommended defensive actions

• Verify kernel version and apply updates if necessary
• Review system configurations for power: supply: max17040 component
• Monitor system logs for potential issues
• 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
• technicalSummary

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but additional information on affected systems and exploitation is limited. Further verification is needed to determine the extent of potential impact and to confirm the effectiveness of the provided fix. The lack of detailed information on exploitation attempts or successful attacks underscores the need for cautious and thorough validation of system configurations and kernel versions.

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.