CVE-2026-31520
Received Received - Intake
Memory Leak in Linux Kernel HID Apple Report Fixup Function

Publication date: 2026-04-22

Last updated on: 2026-04-28

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: HID: apple: avoid memory leak in apple_report_fixup() The apple_report_fixup() function was returning a newly kmemdup()-allocated buffer, but never freeing it. The caller of report_fixup() does not take ownership of the returned pointer, but it *is* permitted to return a sub-portion of the input rdesc, whose lifetime is managed by the caller.
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Meta Information
Published
2026-04-22
Last Modified
2026-04-28
Generated
2026-06-16
AI Q&A
2026-04-22
EPSS Evaluated
2026-06-14
NVD
CVE-2026-31520
EUVD
EUVD-2026-24905
Affected Vendors & Products
Showing 7 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel From 6.13 (inc) to 6.18.21 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.11 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.131 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.80 (exc)
linux linux_kernel From 5.17 (inc) to 6.1.168 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-401 The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
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Executive Summary

This vulnerability exists in the Linux kernel's HID apple driver, specifically in the apple_report_fixup() function. The function was returning a newly allocated memory buffer using kmemdup(), but it never freed this memory, causing a memory leak. The caller of this function does not take ownership of the returned pointer, which means the allocated memory remains unfreed, leading to inefficient memory usage.

Impact Analysis

The primary impact of this vulnerability is a memory leak in the Linux kernel when using the affected apple HID driver. Over time, this can lead to increased memory consumption, potentially degrading system performance or causing resource exhaustion if the leak is significant and persistent.

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