What’s Vulnerable › Vulnerabilities

CVE-2023-53071: wifi: mt76: do not run mt76_unregister_device() on unregistered hw

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-02 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: do not run mt76_unregister_device() on unregistered hw Trying to probe a mt7921e pci card without firmware results in a successful probe where ieee80211_register_hw hasn't been called. When removing the driver, ieee802111_unregister_hw is called unconditionally leading to a kernel NULL pointer dereference. Fix the issue running mt76_unregister_device routine just for registered hw.

Affected products

• Linux kernel: from 5.18 before 6.1.113; from 6.2 before 6.2.9; 6.3-rc1, 6.3-rc2, 6.3-rc3 — fixed in 6.1.113, 6.2.9

How to fix

Upgrade to a fixed version: Linux kernel 6.1.113, 6.2.9. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2d34f27714c97a9786a30b3bb54944d6d8ed612f
• https://git.kernel.org/stable/c/41130c32f3a18fcc930316da17f3a5f3bc326aa1
• https://git.kernel.org/stable/c/dffe86df26aee01a5fc56a175b7a7f157961e370

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