CVE-2026-97407 Linux CVE debrief

Who should care

Linux kernel maintainers, administrators, and users of affected systems should assess exposure and prioritize patching or verification to prevent operational impacts. This includes reviewing system configurations, verifying runtime states, and ensuring that compensating controls are in place for exposed systems. The vulnerability’s resolution emphasizes the need for rigorous testing and validation of kernel changes to prevent similar issues.

Why it matters

The Linux kernel vulnerability could lead to undefined device states and unpowered register accesses if not patched or verified.

• Verify runtime states and system configurations to prevent undefined device states.
• Prioritize patching or verification for affected Linux kernel deployments.

Technical summary

The Linux kernel vulnerability was resolved by replacing pm_runtime_get_sync() with pm_runtime_resume_and_get() and returning early on failure to avoid unpowered register accesses. This change ensures that the device state is valid before accessing hardware registers, preventing potential system instability. Affected Linux kernel deployments should be assessed for exposure, and patching or verification should be prioritized to mitigate risks. The vulnerability highlights the importance of proper runtime PM handling in kernel development.

Defensive priority

Assess Linux kernel deployments for exposure, prioritize patching or verification for affected systems.

Recommended defensive actions

• Assess Linux kernel deployments for exposure
• Prioritize patching or verification for affected systems
• Verify system configurations and runtime states
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions, retest remediated assets
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the Linux kernel vulnerability and its resolution. The vulnerability was resolved by replacing pm_runtime_get_sync() with pm_runtime_resume_and_get() and returning early on failure to avoid unpowered register accesses. Evidence is limited to CVE and NVD details; further verification is recommended.

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.