CVE-2026-93791 Linux CVE debrief

Who should care

Linux system administrators and security teams should assess exposure and verify kernel updates. The vulnerability's severity and potential impact on system security necessitate prompt attention from Linux system administrators and security teams. They should review system configurations, ensure proper bounds checking, and plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Why it matters

This vulnerability in the Linux kernel's iwlwifi component requires verification of kernel updates and assessment of exposure in Linux-based systems.

• Verify Linux kernel updates to prevent potential crashes or code execution
• Assess exposure in Linux-based systems to prioritize patching

Technical summary

The Linux kernel's iwlwifi component has a vulnerability involving a firmware-controlled value used as an array index without proper bounds checking. The vulnerability has been resolved through a patch that adds a bounds check against IWL_MAX_TID_COUNT before dereferencing the array. The patch ensures that the firmware-controlled value is validated before being used as an array index, preventing potential crashes or code execution. Linux system administrators and security teams should assess exposure and verify kernel updates to prevent potential security risks.

Defensive priority

Verify Linux kernel updates and assess exposure in Linux-based systems.

Recommended defensive actions

• Verify Linux kernel version and assess exposure
• Check for updates to the Linux kernel
• Review system configurations and ensure proper bounds checking
• 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
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. Three source references from the Linux kernel Git repository are available. The evidence is based on the official CVE Program record and the NIST NVD detail page. The vulnerability has been resolved through a patch that adds a bounds check against IWL_MAX_TID_COUNT before dereferencing the array. The patch ensures that the firmware-controlled value is validated before being used as an array index.

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.