CVE-2026-93789 Linux CVE debrief

Who should care

Linux system administrators and users of iwlwifi-enabled devices should verify and apply patches. Affected operator, platform, vulnerability-management, and security-team impact include verifying Linux kernel updates for iwlwifi component and reviewing system configurations for iwlwifi usage.

Why it matters

CVE-2026-93789 is a vulnerability in the Linux kernel's iwlwifi component. It requires verification of Linux kernel updates and review of system configurations for iwlwifi usage.

• Verify Linux kernel updates for iwlwifi component to prevent potential issues
• Review system configurations for iwlwifi usage to ensure secure operation

Technical summary

The Linux kernel's iwlwifi component had a vulnerability where it did not properly validate aligned TLV advance in the FW parser, potentially leading to length underflow on malformed TLVs. This has been resolved through code changes detailed in source references. The vulnerability affects Linux system administrators and users of iwlwifi-enabled devices, requiring verification of Linux kernel updates and review of system configurations for iwlwifi usage. CVE-2026-93789 is a vulnerability in the Linux kernel's iwlwifi component.

Defensive priority

Verify Linux kernel updates for iwlwifi component

Recommended defensive actions

• Verify Linux kernel updates for iwlwifi component
• Review system configurations for iwlwifi usage
• Apply patches from Linux kernel stable branch
• 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 NVD entry provide details on the vulnerability. Three source references are provided, detailing specific code changes. The Linux kernel's iwlwifi component had a vulnerability where it did not properly validate aligned TLV advance in the FW parser, potentially leading to length underflow on malformed TLVs. This has been resolved through code changes detailed in source references.

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.