CVE-2026-93799 Linux CVE debrief

Who should care

Linux kernel administrators and security teams responsible for iwlwifi module deployments should assess exposure and apply patches to prevent exploitation. This includes teams managing Linux-based systems, security teams monitoring for potential exploitation attempts, and administrators responsible for applying patches and verifying system configurations.

Why it matters

CVE-2026-93799 is a high-severity vulnerability in the Linux kernel's iwlwifi module that requires validation and patching to prevent potential out-of-bounds indexing and system instability. Linux kernel administrators and security teams should assess exposure and apply patches.

• Potential out-of-bounds indexing and memory access
• Possible system crashes or instability
• Verification of patch application and system configurations required

Technical summary

The BA_WINDOW_STATUS_NOTIFICATION_ID in the iwlwifi module of the Linux kernel does not validate the sta_id before using it to index the fw_id_to_mac_id array, potentially leading to out-of-bounds indexing. This vulnerability can cause system crashes or instability and requires patching to prevent exploitation. The affected module is part of the Linux kernel's wireless driver and is used in various Linux distributions. Linux kernel administrators and security teams should assess exposure and apply patches to prevent exploitation.

Defensive priority

High-priority assessment and patching recommended for Linux kernel deployments using the iwlwifi module.

Recommended defensive actions

• Assess exposure and apply patches for Linux kernel deployments using the iwlwifi module
• Verify system configurations and inventory for potential impact
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• 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
• 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 vulnerability, but additional information on affected versions and exploitation is limited. The Linux kernel's iwlwifi module is vulnerable to out-of-bounds indexing due to a lack of validation in the BA_WINDOW_STATUS_NOTIFICATION_ID. Defenders should verify patch application, review system configurations, and monitor for potential exploitation attempts. The CVE was published on 2026-09-24T17:17:12.720Z and has not been modified since then.

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.