What’s Vulnerable › Vulnerabilities

CVE-2026-43140: HID: magicmouse: Do not crash on missing msc->input

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-06 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: HID: magicmouse: Do not crash on missing msc->input Fake USB devices can send their own report descriptors for which the input_mapping() hook does not get called. In this case, msc->input stays NULL, leading to a crash at a later time. Detect this condition in the input_configured() hook and reject the device. This is not supposed to happen with actual magic mouse devices, but can be provoked by imposing as a magic mouse USB device.

Affected products

• Linux kernel: from 2.6.37 before 5.10.252; from 5.11 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16 — fixed in 5.10.252, 5.15.202, 6.1.165, 6.12.75, 6.18.16, 6.19.6

How to fix

Upgrade to a fixed version: Linux kernel 5.10.252, 5.15.202, 6.1.165, 6.12.75. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/165912d4321c692321c02793068d30700b4e0f1a
• https://git.kernel.org/stable/c/17abd396548035fbd6179ee1a431bd75d49676a7
• https://git.kernel.org/stable/c/243e1165eb03aca97d87aafa9c3130593837a1c2
• https://git.kernel.org/stable/c/36c83c1329dd881f290f7df2feadfb9a21775108
• https://git.kernel.org/stable/c/5bbe266272d86c0657e8253600f3d5b74fb7b2ae
• https://git.kernel.org/stable/c/922bd3e498a4b8e445def6e6ffea2ad3682ad516
• https://git.kernel.org/stable/c/db5ba06e7af9325519a03e52fccf4a9e7c1fd9b2
• https://git.kernel.org/stable/c/f6a3860241fbb556fd72332fa31c5e787004413b

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