CVE-2026-99022 Linux CVE debrief

Who should care

Linux kernel maintainers, users working with regulator: ltc3676, security teams responsible for Linux kernel systems, and operators of affected platforms should assess exposure and apply patches to prevent unintended system resets. Those responsible for vulnerability management, platform security, and system monitoring should also review the impact of this vulnerability and take necessary actions.

Why it matters

CVE-2026-99022 is a Linux kernel vulnerability in the regulator: ltc3676 module that allows unintended register access, potentially causing system resets. Linux kernel maintainers and users should assess exposure and apply patches.

• System resets due to unintended register access
• Potential for unexpected behavior when reading HRST and CLIRQ registers
• Need for patching to prevent unintended system resets

Technical summary

The Linux kernel's regulator: ltc3676 module incorrectly reads write-only HRST and CLIRQ registers, potentially causing system resets. The issue is resolved by splitting the callback to keep HRST and CLIRQ writable but not readable. This change prevents unintended register access and reduces the risk of system resets. Linux kernel maintainers and users should assess exposure and apply patches to prevent unintended system resets. The technical details involve modifying the regulator: ltc3676 module to correctly handle HRST and CLIRQ registers.

Defensive priority

Medium priority for Linux kernel maintainers and users, especially those working with regulator: ltc3676, to assess exposure and apply patches.

Recommended defensive actions

• Review and apply patches for the regulator: ltc3676 module
• Assess exposure and potential impact on Linux kernel systems
• Monitor system logs for unexpected register access attempts
• 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 about the vulnerability in the Linux kernel's regulator: ltc3676 module. The issue is related to reading write-only registers, which can cause unintended system resets.

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.