CVE-2026-31522
Memory Leak in Linux Kernel HID MagicMouse Component
Publication date: 2026-04-22
Last updated on: 2026-04-28
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 5.15.17 (inc) to 5.15.203 (exc) |
| linux | linux_kernel | From 5.16.3 (inc) to 5.17 (exc) |
| linux | linux_kernel | From 5.17 (inc) to 6.1.168 (exc) |
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a memory leak in the Linux kernel's magicmouse driver, specifically in the function magicmouse_report_fixup().
The function was returning a newly allocated buffer using kmemdup(), but it never freed this allocated memory.
Additionally, the caller of this function does not take ownership of the returned pointer, which means the allocated memory remains unfreed, causing a memory leak.
How can this vulnerability impact me? :
The memory leak caused by this vulnerability can lead to increased memory usage over time in systems using the affected magicmouse driver.
If exploited or left unpatched, it could degrade system performance or potentially cause system instability due to exhaustion of available memory.