CVE-2026-98426 Linux CVE debrief

Who should care

Linux system administrators, security teams, and developers using the mwifiex driver should assess their exposure and apply patches as necessary to prevent potential security risks. They should verify their kernel versions, apply patches, and monitor system logs to detect potential issues related to mwifiex. Additionally, they should review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

CVE-2026-98426 is a Linux kernel vulnerability in the mwifiex driver that can lead to IRQ leaks if not patched. Linux system administrators and security teams should verify their kernel versions, apply patches, and monitor system logs.

• Verify Linux kernel versions to determine exposure
• Apply patches to affected versions to prevent IRQ leaks
• Monitor system logs for issues related to mwifiex

Technical summary

The Linux kernel mwifiex driver had a vulnerability where an IRQ leak occurred due to incorrect handling of MSI-X error paths. The fix involves using the correct index in the cleanup loop to free IRQs properly. This vulnerability can lead to security risks if not patched, as it allows attackers to potentially exploit the IRQ leak. Linux system administrators and security teams should assess their exposure and apply patches as necessary to prevent potential security risks. The vulnerability is caused by incorrect handling of MSI-X error paths in the mwifiex driver, which can lead to IRQ leaks if not patched.

Defensive priority

Verify Linux kernel versions and assess exposure based on used versions.

Recommended defensive actions

• Verify Linux kernel versions in use and assess exposure
• Review and apply patches for affected versions
• Monitor system logs for potential issues related to mwifiex
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability and its resolution. However, specific version details and potential exploits are not provided, limiting the ability to assess the full impact. Linux system administrators and security teams should verify their kernel versions, apply patches, and monitor system logs to detect potential issues related to mwifiex. The lack of specific version details and potential exploits makes it difficult to assess the full impact of the vulnerability.

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.