NULL Pointer Dereference in Linux Kernel mt76 WiFi Driver

Publication date: 2026-06-26

Last updated on: 2026-07-06

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7925: prevent NULL pointer dereference in mt7925_tx_check_aggr() Move the NULL check for 'sta' before dereferencing it to prevent a possible crash.

CVSS Scores

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Meta Information

Published

2026-06-26

Last Modified

2026-07-06

Generated

2026-07-17

AI Q&A

2026-06-26

EPSS Evaluated

2026-07-15

NVD

CVE-2026-53318

EUVD

EUVD-2026-39853

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 6.13 (inc) to 6.18.33 (exc)
linux	linux_kernel	From 6.19 (inc) to 7.0.10 (exc)
linux	linux_kernel	From 6.11 (inc) to 6.12.91 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel's wifi driver for the mt7925 chipset. It involves a NULL pointer dereference in the function mt7925_tx_check_aggr(). Specifically, the code did not check if the pointer 'sta' was NULL before using it, which could cause the system to crash. The fix moves the NULL check for 'sta' before it is dereferenced to prevent this crash.

Impact Analysis

This vulnerability can cause a system crash due to a NULL pointer dereference in the wifi driver. Such a crash could lead to a denial of service, interrupting network connectivity and potentially requiring a system reboot to restore normal operation.

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