CVE-2026-93791
Received Received - Intake

WiFi Stack Buffer Overflow in Linux Kernel

Publication date: 2026-09-24

Last updated on: 2026-09-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mvm: add a check on the tid coming from the firmware ba_notif->tid is a firmware-controlled u8 that is used directly as an array index into tid_data[] without any validation. Add a bounds check against IWL_MAX_TID_COUNT before dereferencing the array.

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Meta Information

Published
2026-09-24
Last Modified
2026-09-24
Generated
2026-09-24
AI Q&A
2026-09-24
EPSS Evaluated
N/A
NVD
CVE-2026-93791
EUVD
EUVD-2026-86178

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
intel iwlwifi *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is in the Linux kernel's iwlwifi driver for Intel Wi-Fi devices. It involves a lack of validation on the tid value received from firmware, which is used as an array index without bounds checking. This could allow firmware to manipulate memory by accessing invalid array indices.

Detection Guidance

This vulnerability involves a bounds check issue in the iwlwifi driver for Intel Wi-Fi devices. Detection requires checking the kernel version and examining the iwlwifi driver code for the specific fix. No direct commands can detect this without kernel inspection.

Impact Analysis

An attacker with control over the Wi-Fi firmware could potentially cause a system crash, execute arbitrary code, or escalate privileges on affected systems. This may lead to unauthorized access or denial of service.

Mitigation Strategies

Update the Linux kernel to a version that includes the fix for this vulnerability. Monitor vendor advisories for Intel Wi-Fi drivers and apply patches as soon as they are available.

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